AI characters, video chat and roleplay, explained.

Barge-in is the ability to interrupt a character in the middle of a reply. You start talking, the character stops, and what they say next answers you instead of finishing the old thought. It keeps you in charge of the conversation, so a scene, a question or a mood can change the moment you want it to.

A live avatar is a visual character that takes part in a conversation as it happens. You speak or type, and the character answers you on screen with a voice and expressions that carry emotion. What makes it live is the connection between you and the reply: the character is responding to this moment, not replaying something recorded earlier.

Camera sharing is choosing to let the other side of a video call see through your camera. In an AI video call, it lets a character respond to your expression or to something you hold up, the way a friend would across a table. Seeing the character on screen never requires it, and your camera is only on when you turn it on.

In roleplay each participant speaks and acts as a character, invented or borrowed from a story, and the scene grows from what each one writes. Online communities add their own vocabulary: a muse is the character someone plays, a plot is a scene two players build together, and IC and OOC separate what a character says from what the players say about the story.

In character describes words, actions or decisions made within a fictional role. A player speaking IC is expressing what their character says or does, while an AI character responding IC uses its assigned persona and the current story situation. The phrase can also mean behavior that fits an established characterization. Neither meaning requires the player to share the character’s real-world beliefs or feelings.

Out of character has two common roleplay meanings. An OOC message is a player’s comment outside the fiction, such as a request to slow the scene or correct a misunderstanding. Separately, calling a response “out of character” means it conflicts with the character’s established traits. Labels such as “OOC:” or brackets can signal intent, but they are conventions rather than a universal AI command.

Godmodding, also spelled godmoding, commonly means overriding another participant’s control of their character or forcing a result they did not agree to in a shared roleplay. Community definitions vary: some include invincible characters or guaranteed success. The practical issue is who gets to decide an action, reaction or outcome. A powerful character is not automatically godmodding when the participants have agreed on those abilities.

A lorebook, also called World Info or a memory book, is a set of entries that an AI chat or roleplay application inserts into the prompt dynamically. An entry pairs trigger keywords with a content field; when a keyword appears in recent messages, the app adds that content to the context for the next reply. Only the content is inserted, not the keywords or the title, and an inserted entry guides the reply without guaranteeing that the reply uses it. Lorebooks keep a long setting consistent without loading every detail into every message.

An AI character persona is a set of authored traits and instructions that shapes a character’s conversational identity: its role, background, priorities, tone and typical behavior. The persona is distinct from the character’s visual appearance and from memories accumulated during conversation. It guides generated responses, but it is not a guarantee that every response will remain perfectly consistent.

An original character is a creator’s own fictional character, often called an OC in art, fandom and roleplay communities. An OC has its own identity rather than simply being an established character played again. It can be designed for a new world or placed in an existing setting. Calling a character an OC does not, by itself, settle questions about rights to borrowed names, images or settings.

Yandere combines the Japanese yanderu (to be unwell) and deredere (lovestruck). The character seems loving and attentive, but the attention escalates into jealousy, watching or control. Fans use the word to label characters, and many enjoy the suspense precisely because it stays on the page. In a story with an AI character, the intensity can stay in the fiction while every choice stays yours.

Menhera is short for the Japanese mentaru herusu, mental health, and entered fandom as a label for characters who are emotionally unstable, dependent or self-destructive in love. Where a yandere turns devotion into obsession with the other person, a menhera turns it inward: jealousy, neediness, fear of being left and a tendency to fall apart. Fans read the type for the tenderness it asks for and the tension it creates. Real mental-health struggles are not a personality type, and a relationship where someone is monitored or made responsible for the other person's stability is not romance.

Tsundere joins the Japanese tsuntsun (curt, standoffish) and deredere (lovestruck). A tsundere denies their feelings, often with a quick jab or an embarrassed “it’s not like I did it for you”, then shows care through actions. Fans use the label for characters whose warmth is earned over time, and the appeal is watching the defensive front give way to honesty.

Kuudere combines kuuru, the Japanese pronunciation of the English word cool, with dere, the lovestruck half of deredere. A kuudere speaks little, stays composed under pressure and rarely names a feeling, so affection appears in small gestures: staying late, remembering a detail, stepping in without being asked. Fans use the label for characters who are steady rather than cold-hearted.

Dandere comes from the Japanese danmari (silence) and deredere (lovestruck). A dandere is not cold: they are anxious about speaking up, so they answer briefly, avoid attention and need time. Once trust grows, the same character becomes openly kind and expressive. Fans use the label for gentle characters whose quietness comes from shyness rather than indifference.

A dere type describes the gap between how a character acts and how they feel. The suffix dere comes from deredere, a Japanese word for being openly lovestruck; the first half names the cover, such as irritation (tsundere), calm (kuudere), shyness (dandere) or obsession (yandere). The four classic types come from Japanese fandom. Newer ones such as sadodere, teasedere and kiridere are fan-made, so this page gives the meaning most fan guides agree on.

A context window is a model’s bounded working space for the information used in a generation. Context is usually measured in tokens rather than words and can include instructions, messages, documents and other supported inputs; output can also share the limit, depending on the model and API. Applications may trim, select or summarize older conversation when assembling the next request.

Persistent memory in an AI conversation system means retaining selected information across sessions and making it available for later responses. It can be implemented with saved facts, summaries or other stored records that the application retrieves when relevant. It is distinct from the current context window, the complete chat transcript and the model’s training. Saving a detail and correctly recalling it are separate steps.

A "comfort character" is a fictional character a reader gravitates to for reassurance and emotional regulation — someone whose steadiness, warmth, or sheer familiarity makes the reader feel safe, seen, and soothed. In romance and BookTok circles it's the book-boyfriend (or any character) you reach for on a hard day, reread instead of starting something new, and use as a stand-in for calm. It matters because the bond is about being held, not thrilled.

Waifu comes from ワイフ (waifu), the Japanese pronunciation of the English word wife, which English-speaking fans borrowed back as slang. Calling a character “my waifu” says she is your favourite, the one you would pick over every other character, and arguing about “best waifu” is a running fandom pastime. The word is usually affectionate and playful, and it usually names a fictional character.

"Fell first" is a romance-reader label for the character in a pairing who develops feelings before their love interest does — the early, helpless faller. It usually travels with its sibling beat, "fell harder," to mark who loved sooner versus who loved deepest. BookTok and Goodreads reviewers use it as praise: a character who's quietly down bad while the other stays oblivious is the catnip of pining and slow-burn romance.

"Why choose" (sometimes RH, or reverse harem) is a romance structure in which one protagonist is in a genuine, lasting relationship with multiple love interests at once — and crucially, no one is asked to choose. Unlike a love triangle that ends with someone losing, every connection is real and stays. BookTok readers reach for the tag when a review promises devotion without the heartbreak of picking, and they want to know it won't collapse into a single endgame.

"Touch her and you die" is a possessive-protector trope in romance and romantasy: the love interest treats harming the heroine as a fatal mistake on the harmer's part, making his violence a love language pointed outward, never at her. BookTok and romance readers use it to flag a hero whose softness for her is matched only by his menace toward the world — the swoon is in the contrast: cold to everyone, undone by one person. It's a core "morally grey hero" signal, often paired with mafia, fae-king, or fated-mate setups.

"Book boyfriend" is BookTok shorthand for a fictional male love interest a reader becomes emotionally attached to — the swoon-worthy hero of a romance or romantasy novel who feels like he belongs to her. Reviewers use it as the highest compliment ("new book boyfriend unlocked") to flag a male lead written with enough yearning, devotion, and charm to ruin real men. It matters because it names the whole reason a reader picks up the genre: the wish to be wanted like that.

"Book hangover" is the lingering, grief-tinged daze a reader feels after finishing a story they loved — too attached to the characters and world to move on to anything else. Romance and BookTok readers use it as the highest praise: a book has to be devastatingly good to leave one. It signals a story that didn't just end but left a hole.

In romance and BookTok, a "cinnamon roll" hero is a male lead defined by his sweetness: tender, considerate, emotionally open, and devoted without cruelty or games. The phrase comes from the meme "too good, too pure for this world." Readers reach for it to flag a book-boyfriend who is safe and soft rather than dangerous — the antidote to the morally-grey or alphahole hero — and it matters because it signals comfort-read, low-angst, openly-loving energy.

"Himbo" (a blend of "him" + "bimbo") is BookTok shorthand for an attractive, sweet, slightly dim male love interest whose appeal is pure devotion rather than cunning — think golden-retriever energy in a man's body. Readers reach for it (often in reviews like "he's such a himbo, I'm obsessed") to praise a hero who's safe, earnest, and emotionally simple in the best way. It matters because after a shelf of brooding manipulators, a himbo is the comfort read: he means exactly what he says.

Instalove (also "love at first sight") is a romance trope where intense, mutual love ignites almost instantly — often within the first chapter or meeting — rather than building over time. BookTok and romantasy readers use it in reviews to flag pacing: it's the opposite of slow burn, prized when the chemistry is electric and the fated pull is the whole point. It works best with a destined-mate or immortal-knows-instantly setup that earns the speed.

In romance and romantasy, "fade to black" means the narrative deliberately cuts away at the threshold of a sex scene, implying intimacy without describing it. BookTok reviewers use it as a content signal — distinguishing closed-door books from "open-door" ones — so readers know what a story shows before they commit. It matters because it lets a story stay deeply romantic and tension-rich while keeping the actual act tasteful and implied.

In romance and romantasy, an anti-hero is a love interest who wins you over despite (or because of) his flaws: morally gray choices, a body count, a refusal to play nice. He is not redeemed by becoming good — he is redeemed by being good to one person, you. BookTok and review readers use "anti-hero" to flag a hero who is dangerous everywhere except in your hands, the line between villain and book-boyfriend.

A tortured hero is a romance archetype: a brooding, self-punishing love interest carrying a wound — guilt, trauma, a body count, a vow — that makes him believe loving him is dangerous, so he holds you at arm's length "for your own good." BookTok and romantasy readers flag him in reviews because the appeal is the slow thaw: the colder he acts, the more it costs him. He matters because the payoff isn't him being saved — it's him choosing you anyway.

In romance and romantasy (and the BookTok reviews that rate them), a "possessive hero" is a male lead whose love manifests as fierce protectiveness and a need to claim — "mine" is his favorite word, and her safety reorders his every priority. Readers seek the term to decode reviews praising it, and to separate the swoony, consent-respecting version from a genuinely controlling one. It matters because it names romance's most charged power fantasy: being wanted that completely, by a man who'd unmake the world before he'd share you.

Dual POV (dual point of view) is a narrative structure where the story alternates between two characters' viewpoints, letting the reader inside both heads instead of one. In romance and romantasy, it almost always means the two leads — so you get her longing AND his guarded inner monologue, the gap between them being the whole thrill. BookTok readers chase it because the "he was obsessed the whole time" reveal only lands when you've been in his POV to see it.

In romance, the "third-act breakup" is a near-the-end separation engineered to test the couple before they earn their HEA (happily ever after). It almost never comes from genuine incompatibility — it's a misunderstanding, a self-protective lie, or a "this is for your own good" sacrifice. BookTok readers flag it in reviews because it's the genre's most divisive beat: agony that makes the reunion sweeter, or a forced detour that frustrates.

A meet-cute is a romance trope: the cute, memorable, usually unplanned scene where two future lovers first cross paths, engineered to feel like fate dressed up as coincidence. BookTok and romantasy readers use it in reviews to flag a book's opening spark — "the meet-cute had me giggling." It matters because it sets the chemistry baseline; a great one promises everything that follows.

MMC (male main character) is the male romantic lead at the center of a romance novel — the "book-boyfriend" whose personality, backstory, and obsession with the FMC (female main character) drive the story. BookTok and romance readers use it in reviews to flag whose love interest carried the book, often paired with a trope shorthand like "touch-her-and-die MMC" or "grumpy MMC." It matters because for most romance readers, the MMC is the entire reason they stayed up till 3am.

"Spice level" is a romance-reader rating of how much on-page sexual content a book contains, usually scored 1-5 (commonly drawn as chili peppers), where 1 is closed-door/sweet and 5 has the most on-page detail. BookTok and Goodreads reviewers use it as a content signal so readers can match a book to their comfort. It describes intensity, not quality — a beloved slow-burn can be "low spice" and still wreck you.

"Slow burn" is a romance pacing trope in which the central couple's feelings develop slowly across the whole story rather than igniting at first sight — built on simmering tension, delayed admission, and a long-deferred first kiss or confession. BookTok and romantasy readers use it in reviews to flag a story that earns its payoff through patience, where the wait IS the pleasure. It's the opposite of insta-love.

FMC is BookTok shorthand for "female main character" — the heroine a romance is told through and built around, as opposed to the MMC (male main character / love interest). In reviews, "the FMC has a spine" or "weak FMC" is the single fastest verdict on whether a heroine is active and worth the reader's loyalty. It matters because the FMC is the reader's seat in the story; a strong one means the romance happens TO someone with agency, not around a placeholder.

HEA (happily ever after) is the romance genre's foundational guarantee: the central couple ends the book emotionally fulfilled and committed for life, with conflict resolved rather than tragic. BookTok and romance readers use it as shorthand for a satisfying, non-ambiguous ending — distinct from HFN (happy for now) — and as the reason the genre feels safe to fall into.

HFN (happy for now) is a category of romance ending in which the central couple is emotionally united and happy as the story ends, but without the explicit lifelong commitment — marriage, mating bond, eternity — that defines an HEA (happily ever after). Romance and BookTok readers use it to flag series-friendly, open-ended, or slow-burn books where the love is real but the future is still being written. It matters because the genre's core promise is an emotionally satisfying ending, and HFN tells a reader the satisfaction is present-tense, not forever-stamped.

A "closed-door" (or "fade-to-black") romance keeps physical intimacy off-page: the story builds full romantic and sexual tension, then cuts away at the bedroom door instead of describing the act. BookTok and Goodreads readers use the label to flag low-spice, suggestion-over-detail reads — the opposite of "open-door." It matters because it lets longing, restraint, and emotional payoff carry the story.

"Open-door romance" describes a love story that depicts its characters' physical intimacy on the page rather than fading to black before the door closes. BookTok and romance reviewers use it as a content signal — the opposite of "closed-door" — telling readers whether intimate scenes are shown or implied. It matters because it sets expectations: an open-door book promises the emotional payoff is consummated where you can see it, not skipped.

A grovel is the moment a romance hero fully abases himself to atone for hurting the heroine — admitting fault without qualification, taking the blame, and proving change through action rather than words. BookTok and romantasy readers prize a "good grovel" as the catharsis that justifies the third-act conflict; a weak or skipped grovel is a common review complaint. The deeper the wound, the harder he must grovel.

"Pining" is a romance-reader term for the prolonged, unspoken longing a character feels for someone they desire but haven't confessed to or can't be with — yearning held in private, often for chapters on end. BookTok and Goodreads reviewers use it to praise the delicious tension of a hero (or heroine) who is gone for someone and suffering beautifully about it, watching, aching, and saying nothing. It matters because pining is the fuel of slow-burn and unrequited-then-mutual love stories: the longer the want goes unspoken, the harder the eventual payoff lands.

In romance and romantasy, yearning is sustained, aching longing for a person — wanting that is felt intensely but held back by duty, fear, distance, or restraint. Reviewers and BookTok use it to flag a slow burn where the emotional tension comes from desire deferred, not satisfied. It's the gap between what a character feels and what he lets himself do — and that gap is the whole appeal.

In romance and BookTok, angst is emotional anguish that delays the happy ending — pining, miscommunication, sacrifice, or duty keeping a couple apart. Reviewers use "low angst" for cozy, low-conflict reads and "high angst" for ones that wreck you. It signals the kind of emotional pain you're signing up for, and many readers chase it on purpose: the higher the ache, the sweeter the eventual relief.

Hurt/comfort is a genre of fan fiction, and now a trope tag across fiction, in which a character receives comfort from another after or while suffering injury, illness or a traumatic experience. Fans trace it to Star Trek fandom in the 1970s, where an older name for the setup was a “get ’em” story (a “get Spock” story put Spock through something terrible); the term hurt/comfort is quoted in fan writing by 1993. In romance, the comfort half is where two guarded people finally let each other close.

"Swoon-worthy" is BookTok shorthand for a romantic beat intense enough to make a reader physically react — a sharp inhale, a hand over the chest, the urge to scream into a pillow. Romance and romantasy readers tag scenes, lines, and love interests this way in reviews to flag the highest tier of emotional payoff. It matters because swoon, not plot, is what readers come back for.

"Alphahole" (alpha + a-hole) is BookTok/romance-reader slang for a love interest who blends classic alpha-male dominance with genuinely abrasive, high-handed behavior — controlling, possessive, cocky, often cold to everyone but the heroine. Readers use it in reviews to flag a hero who is rude and infuriating early on but redeems through fierce, exclusive devotion; the appeal is the thaw, not the cruelty. It signals enemies-to-lovers tension and a guarded man undone by one person.

"Morally grey" is romance-reader shorthand for a character whose moral code is genuinely compromised — he does ruthless, ethically dark things — but who is written sympathetically because he is loyal, principled in his own warped way, and softest with the heroine. BookTok and romantasy readers use it in reviews to flag a hero you root for despite knowing better; it's the opposite of a clean-cut "cinnamon roll." The appeal is the tension: danger to the world, devotion to you.

In romance and BookTok, a "bad boy" is a hero defined by his defiance — he breaks rules, keeps people at a distance, and answers to no one — but who becomes unguardedly tender toward the heroine alone. Readers reach for the term in reviews to flag a love interest whose danger is real but whose devotion is reserved, not absent. It matters because the fantasy isn't the bad behavior; it's being the single exception to it.

In romance, a rake is a roguish, womanizing hero — historically a Regency-era libertine known for gambling, seduction, and a scandalous reputation — whose charm is matched only by his refusal to be tamed. Romance and BookTok readers use "rake" to flag the classic arc where a practiced heartbreaker is undone by the one woman he can't charm and won't risk losing. It matters because the appeal isn't the conquest — it's watching the unconquerable man choose to be caught.

Single dad romance centers a hero who's a sole-parenting father — widowed, divorced, or guardian by circumstance — whose devotion to his kid is the proof of how he'll love a partner. Romance and BookTok readers reach for it when a review promises competence, gentleness under gruffness, and the high stakes of being trusted with someone's whole world. It matters because the swoon isn't just him wanting you; it's him deciding you're safe enough to belong.

A love triangle is a romance structure where the protagonist is romantically entangled with two suitors at once, forced to weigh competing kinds of love — duty versus desire, comfort versus chemistry — until she chooses one (or, in some books, neither). BookTok and romantasy readers tag it in reviews to flag the central tension and warn for the inevitable heartbreak of the "loser." It matters because the choice is really the heroine deciding who she wants to become.

A soulmate is a person to whom you feel an inevitable, total connection — the sense that you were always meant to find each other, and that being seen by them feels like coming home. Romance and BookTok readers use it for the deepest pairings, where the bond reads as fated rather than chosen. It matters because it's the genre's highest promise: not just wanted, but recognized.

The miscommunication trope is a romance device where the central conflict comes not from real opposition but from a misunderstanding the characters never simply talk out — an unspoken feeling, a withheld confession, an overheard fragment, or a wrong assumption taken as fact. BookTok and romance readers flag it in reviews (often as the love-it-or-hate-it "just-talk-to-each-other" plot) because the whole tension rests on what stays unsaid. It matters because, done well, it turns one honest sentence into the most romantic beat in the book.

"Only one bed" is a forced-proximity romance trope in which circumstance — a sold-out inn, a snowstorm, one safe room — leaves two characters no choice but to share a single bed. Romance and BookTok readers prize it because the bed itself does the work: it strips away every excuse not to be close, forcing buried want into the open. It's a slow-burn engine — the tension is in the restraint, the careful line drawn down the middle of the mattress that nobody quite respects.

The amnesia trope is a romance storyline in which a character suffers memory loss — total amnesia, a forgotten relationship, or a wiped past — forcing love to be re-earned or rediscovered. BookTok and romantasy readers flag it in reviews as a high-angst "second-chance from zero" device, prized for the gut-punch of "he doesn't remember me" and the swoon of him choosing her again anyway. It matters because it tests whether love is fate or just habit.

A secret identity romance centers on a hero (or heroine) concealing their real status, name, or role — royalty, an assassin, a famous face, a sworn protector — while a relationship deepens around the lie. Romance and BookTok readers reach for it in reviews to flag the delicious tension of "she doesn't know who he is yet," and the gut-drop reveal that recontextualizes every earlier moment. It matters because the secret raises the stakes of trust: love is tested against the truth.

An arranged marriage is a romance trope where the couple is married by external arrangement — a political alliance, family bargain, or binding pact — rather than by choice, and the love story unfolds after the vows. BookTok and romantasy readers prize it for the slow thaw from cold obligation to genuine devotion. It matters because the tension is built-in: two strangers, one bed, and a contract neither asked for but both quietly start to want.

“The ick” is a sudden feeling of cringe or mild disgust toward a partner or crush that replaces attraction, usually set off by a trivial behaviour rather than a real incompatibility. You “get the ick” or someone “gives you the ick”, and each trigger is “an ick”. The first documented use in this sense is a 1998 episode of Ally McBeal; Sex and the City named a 2003 episode “The Ick Factor”; Love Island contestant Olivia Attwood made it a catchphrase in 2017, and by 2020 catching the ick was everyday TikTok vocabulary.

In romance and BookTok, a green flag is a positive trait or action that marks a love interest as healthy, trustworthy, and worth keeping — the opposite of a red flag. Readers use it in reviews and group chats to flag a hero who communicates, respects boundaries, and shows up without being asked. It matters because it's shorthand for "this is the standard," sorting swoon-worthy devotion from drama dressed up as passion.

A red flag is a behavior that warns of harm or instability in a relationship: checking someone's phone without asking, anger when they see friends, dismissing their feelings, never apologising. Romance and BookTok readers use it two ways: as a real caution in reviews, and as a joke about a brooding fictional hero. The joke works only because it stays in the book. In real life, respect, honesty and the freedom to leave come first.

Delulu is BookTok and romance-reader shorthand for "delusional," used affectionately to describe willingly believing a book boyfriend (or crush) is real and into you. The mantra "delulu is the solulu" means the delusion is the solution — leaning into the fantasy as a coping joy, not a problem. Readers use it in reviews to flag a love interest worth losing your grip over.

“Ride or die” is slang for extreme, unconditional loyalty. It works as a noun (“my ride or die”), as an adjective (“a ride-or-die friend”) and, less often, as a verb (“I’ll ride or die with you”). The phrase is usually traced to 1950s motorcycle slang for a rider who would rather die than stop riding, and it reached the mainstream through 1990s hip-hop, where Yo-Yo and Ice Cube’s 1993 “The Bonnie and Clyde Theme” helped popularise the idea of a partner willing to ride or die.

Romantasy (romance + fantasy) is a genre where a central, emotionally-driven love story unfolds inside a fully fantastical world — courts, magic, dragons, fae, immortals, fated bonds — with the romance as the engine, not the garnish, and an emotionally satisfying or happy ending as the genre promise. BookTok and romance readers use it to flag books like ACOTAR or Fourth Wing where the spellwork and the slow burn matter equally; reviewers reach for it when "fantasy romance" sounds too cool and "romance" undersells the worldbuilding. It matters because it names the exact ratio a reader craves: high-stakes magic that always bends back toward the relationship.

BookTok is the book-focused community on TikTok, dominated by romance and romantasy readers who share reviews, trope-coded recommendations, and emotional reactions to fiction. Readers use it to discover their next read and to decode reviews studded with shorthand like "touch her and die" or "morally gray." It matters because BookTok drives real sales — its enthusiasm can turn an unknown novel into a bestseller and has reshaped what publishers acquire.

A bodice ripper is a subgenre of historical or epic romance defined by intense, often turbulent passion between a strong-willed heroine and a powerful, possessive hero, named for the dramatic vintage cover art of a lacing coming undone. Romance and BookTok readers use it to flag big, old-school emotional stakes and passion — sweeping, melodramatic, all-consuming. It matters because it's the genre's origin story: the template for fated, high-tension, female-gaze desire.

In romance and BookTok, "soft boy" describes a male love interest defined by emotional openness and gentleness rather than dominance or brooding. He's nurturing, communicative, and quietly devoted, the boyfriend who texts first, remembers the small things, and makes the heroine feel safe instead of pursued. Readers reach for the term to flag a hero who is comforting rather than tortured, the warm counterweight to the dark, possessive archetypes.

A situationship is a romantic or sexual relationship that is undefined and noncommittal: the people in it are more than friends but less than committed partners. It combines “situation” and “relationship”, stayed obscure until about the mid-2010s, and became common vocabulary through social media and dating coverage. What separates it from casual dating is that real feelings are usually involved; what separates it from a relationship is that nobody has asked “what are we?”, or the answer was avoided.

Yaoi (やおい) began as a self-mocking acronym in Japanese fan-comic circles: yama nashi, ochi nashi, imi nashi, roughly "no climax, no punchline, no meaning", for fan stories that skipped the plot to focus on two male characters' relationship. From the 1990s, boys' love (BL) became the publishing label in Japan and yaoi stayed mostly a fan word. In English-speaking fandom, yaoi is still widely used as a name for the genre.

In everyday English a crush is an infatuation: romantic interest that is new, intense and mostly one-sided or unconfirmed. A crush can fade, stay a private feeling or turn into a relationship once both people share it. In romance stories the secret crush is a popular setup, because the tension lives in what has not been said yet.

In relationship slang, toxic means harmful in a lasting way. A toxic pattern might include jealousy that limits who someone sees, guilt-tripping, belittling comments, or affection given and withdrawn to keep control. Healthy relationships have conflict too; the difference is respect, honesty and repair afterwards. A single warning sign is a red flag, while toxic usually describes the settled pattern.

Simp, an old shortening of simpleton, spread on social media and gaming streams around 2019 and 2020. It targets excessive, one-sided effort, especially when the other person shows little interest. Friends also use it jokingly for being openly fond of a celebrity or fictional character. Kindness and attention are not simping; the word mocks effort that ignores whether the feeling is mutual.

Player comes from the idea of playing the field. A player is attentive and charming at first, but keeps things deliberately vague: rarely introducing partners to friends, disappearing for days and changing the subject when asked what the relationship is. Dating several people openly, with everyone aware, is not the same thing; what makes someone a player is the secrecy and the mixed signals.

A trope is something recurring across a genre or type of art or literature: a familiar plot, character type or situation that audiences recognise. In rhetoric, the older sense, a trope is a word or phrase used with a figurative rather than literal meaning, such as a metaphor, irony or hyperbole. The word comes through Latin tropus from the Greek tropos, “a turn, a way, a manner”, the same idea as a turn of phrase. A trope differs from a motif, which recurs inside one work, and from a cliché, which is a trope used so flatly it no longer works.