The smut glossary

Where each vocabulary came from

Knowing the provenance of a term tells you which community you're about to walk into, which is useful when searching.

Fandom vocabulary — smut, PWP, hurt/comfort, slow burn, x reader, A/B/O — developed on mailing lists and archives from the nineties onward. It describes what a story does to you and how it's structured. Searching with these terms finds fanfiction and the communities around it.

Kink vocabulary — D/s, subspace, aftercare, CNC, protocol — comes out of organised BDSM communities and is considerably older, with roots in twentieth-century leather culture. It describes practices and safety structures. Searching with these terms finds practitioner communities, not fiction.

Romance publishing vocabulary — HEA, spice level, closed door, grovel — comes from the commercial genre and its readership. It describes market categories. Searching with these finds books and reviews.

The three have been merging rapidly since BookTok, which is why a single review can now contain terms from all three. That's new, and it's mostly good — but it does mean a term's origin no longer reliably tells you where you'll end up.

Ratings and content tags

Smut — explicit sexual content. PWP — porn without plot, or plot what plot; the sex is the whole work. Lemon — an archaic term for explicit content from early anime fandom; lime meant suggestive only.

Fluff — warm, comforting, usually non-explicit. Angst — emotionally painful. Hurt/comfort — one character is damaged and another looks after them; one of the most enduring structures in the genre.

Spicy — the mainstream-romance euphemism, usually with a one-to-five pepper rating. Dead dove — a warning that the content is exactly as dark as tagged and will not be softened. Non-con and dub-con — non-consensual and dubiously consensual content as fiction; see also CNC.

Structure and trope tags

Slow burn — a long build before anything happens. Enemies to lovers — exactly what it says, and the most reliably popular structure in the genre. Friends to lovers, second chance, fake dating, marriage of convenience — the other four workhorses.

Forced proximity — the characters cannot get away from each other. Only one bed — its most beloved specific instance. Found family — an unrelated group who become one, common in fandom and often the emotional engine underneath the romance.

Mutual pining — both want it, neither says so. Idiots to lovers — the comic version of the same. Canon divergent — a story that branches from the source material at a specified point. Fix-it — a story written to undo something the source did.

Fandom-specific vocabulary

Ship — a romantic pairing, from 'relationship'. OTP — one true pairing. Rare pair — an uncommon ship. Poly ship — three or more.

X reader — a story written in second person with the reader as a character. Self-insert — similar, with an original character standing in for the author. OC — original character.

AU — alternate universe, a version of the source with something fundamental changed; coffee shop AU and modern AU are the most common. A/B/O or omegaverse — a fan-invented biology with alphas, betas and omegas, heats, ruts and mating bonds, now a genre in its own right.

Canon — what the source material established. Fanon — what the fandom has collectively decided is true anyway. Beta — someone who edits a fic before posting.

Kink vocabulary

D/s — dominance and submission. Dom, sub, switch — the roles. Domme — a dominant woman. Top and bottom — who is acting and who is receiving, not necessarily the same as dominant and submissive.

Safeword — an agreed word that stops a scene. Aftercare — looking after each other once a scene ends. Subspace and subdrop — the altered state during a scene and the crash afterwards. Negotiation — the conversation that establishes what will and won't happen.

CNC — consensual non-consent. Impact play — flogging, caning, spanking and similar. Edging — stopping just before orgasm, repeatedly. Denial — withholding orgasm. Praise kink and degradation — the two directions of verbal assessment.

Primal — instinct-driven play without much protocol. Brat and brat tamer — a submissive who resists deliberately and the dominant who enjoys that. Service submission — submission expressed through doing things well. Protocol — an agreed rule set governing behaviour.

Dynamics you'll see named

Hotwife, cuckold, cuckquean, stag and vixen — variants of consensual non-monogamy where one partner's other lovers are the point. Compersion — pleasure in a partner's pleasure with someone else.

Femdom and maledom — dominance by gender. Gentle dom or soft dom — dominance without cruelty. Findom — financial domination. Keyholder — the partner controlling a chastity device.

DDlg, MDlb, CG/l — caregiver and little dynamics between adults. ABDL — adult baby / diaper lover. Pet play, primal play, age play — regression and role-based dynamics, all between adults.

Terms from romance publishing

The romance industry has its own vocabulary, largely separate from fandom's, and the two have been merging fast since BookTok.

HEA — happily ever after, the genre's traditional required ending. HFN — happy for now, the softer version. A romance that ends unhappily is generally considered not to be a romance at all, which is a genre rule readers take seriously.

Meet cute — the first encounter, engineered to be charming. Grovel — the scene where the character who wronged the other has to earn their way back; readers have strong opinions about grovel quality. Third-act breakup — the near-obligatory separation before the resolution, widely complained about and universally used.

Closed door — sex happens off the page. Open door — it doesn't. Steam level, heat level or spice level — the rating, usually one to five. Dark romance — morally compromised love interests and no promise that anyone behaves well.

Why it matters for prompting: these terms are precise and models know them. "Open door, high heat, no third-act breakup, HEA" communicates a structure in eight words that would take a paragraph to describe otherwise.

Terms for what a story is doing to you

A smaller set, from readers rather than writers, describing effects rather than content. Useful because they're often what you actually want to ask for.

Slow burn is the famous one, but its opposite has no agreed name — 'immediate' or 'PWP' get used. Yearning describes prolonged unfulfilled wanting, usually one-sided, and is a mood rather than a plot. Pining is the same thing from closer to the character.

Comfort fic — something read for reassurance rather than novelty, often re-read. Whump — a character being put through sustained physical suffering, usually as a vehicle for the care that follows. Fluff without plot — the tender counterpart to PWP.

Tension, in this vocabulary, means specifically the state of two people not doing something. A story described as tense is usually a story where nothing happens, which is a compliment.

And catharsis — the release after sustained tension, which is what the whole apparatus of slow burn exists to produce. Asking a generator for 'yearning' or 'catharsis' works better than most people expect, because these are well-represented concepts in the training data with clear stylistic signatures.

Terms you'll see and should probably avoid

A short list, offered without judgement, of vocabulary that carries baggage worth knowing about before you use it in public.

Cuck. Ordinary community vocabulary that escaped into political insult around 2016 and hasn't come back. Within the kink it means what it always meant; outside it, it now signals something unrelated.

Daddy. Enormously common and entirely benign in context, but the single term most likely to be misread by someone outside the community — particularly given DDlg's name problem.

Rape fantasy. Accurate to what some people mean and needlessly ambiguous. CNC or consensual non-consent says the same thing while making the consent explicit, which is why the community moved to it.

Lolicon and shotacon. Sometimes offered as fandom vocabulary. They describe sexual content involving child-coded characters, which is a hard line everywhere reputable and refused outright here regardless of framing.

The general principle: this vocabulary developed inside communities where context was shared, and it travels badly. If you're writing for yourself, use whatever you like. If you're writing anywhere public, the clearer term is usually the better one.

Using this vocabulary to find things

The practical payoff of knowing all this is that it makes searching dramatically more effective, in three ways.

Precision. 'Slow burn, hurt/comfort, canon divergent' finds something specific. 'Romantic story' finds everything, which is the same as finding nothing. Tag vocabulary is the search interface for this entire genre.

Exclusion. Most archives let you filter out tags as well as filter for them, and knowing the vocabulary for what you don't want is at least as valuable. The single most useful skill in fic-finding is knowing the name of the thing that ruins a story for you.

Community. Each vocabulary set leads somewhere different — fandom terms to archives, kink terms to practitioner communities, romance terms to book reviewers. If the results aren't what you wanted, changing the vocabulary changes the neighbourhood.

And for generation specifically, tags are the most efficient instruction available. Models know this vocabulary well, and four tags communicate more usable structure than a paragraph of description. It's the highest-value thing on this page.