Glossary
What is smut?
Smut is sexually explicit writing, or other material made to be sexy rather than subtle. Among readers today it usually means books and stories with detailed, on-page sex scenes, and it’s said with affection at least as often as disapproval.
The word has an older, dirtier history, and a newer, friendlier one. Here’s both, plus how smut differs from erotica and romance.
The dictionary meaning
Dictionaries give smut three meanings:
- Obscene or indecent material: talk, writing or pictures about sex. This is the meaning most people are searching for.
- A smudge of dirt or soot, as in a smut on your cheek.
- A plant disease: a fungus that blackens grain such as corn and wheat. Corn smut is also eaten as a delicacy in Mexico, where it’s called huitlacoche.
The sexual meaning grew out of the dirty one. The word comes from an old verb meaning to stain or smudge, so “smut” was dirty talk long before anyone called a book that.
What smut means in books
When readers say a book “has smut”, they mean the sex scenes happen on the page, in detail, instead of behind a closed door. Most of the time they’re talking about romance, including romantasy and fan fiction.
A few terms you’ll see around it:
- Spice, or spicy. How explicit a book is. Readers often rate it from one to five chili peppers: one is kissing, five is very explicit and frequent. “Spicy” is the polite cousin of “smutty”. To rate a passage from a book you’re reading, paste it into the book spice level checker.
- Open door and closed door. A closed-door romance stops at the bedroom door; an open-door romance follows the couple in.
- Smut with plot. A story where the sex scenes matter, but so do the characters and what happens to them.
- PWP. Short for “plot, what plot?” (or “porn without plot”), from fan fiction: a story that exists mainly for the sex scenes.
Smut vs erotica vs romance
They overlap, and people use them loosely, but there are real differences:
| Romance | Erotica | Smut | |
|---|---|---|---|
| What the story is about | The relationship | The characters’ sexual journey | Either; the word just says the sex is on the page |
| Ending | A happy or hopeful one is expected | No rule | No rule |
| How explicit | Anything from closed door to very explicit | Explicit | Explicit |
| What kind of word | A genre and a bookstore shelf | A genre | Slang |
So a spicy romance can be smut, and so can erotica. A sweet romance with a closed door isn’t smut at all.
Is “smut” an insult?
It used to be, mostly, and some people still use it that way: “that’s just smut” means “that’s trash”. Among readers the word has been taken back. Plenty of people now describe what they want to read as smut, with a wink, and book-review videos and posts use it as a selling point. Context tells you which meaning someone has in mind.
Smut on metime
metime writes interactive stories for adults, and some of them are smut in the reader’s sense: explicit chapters, written for you, behind sign-in. You choose how warm each story gets: Clean (the door closes), Steamy (charged, not explicit) or Explicit (written plainly). At the end of every chapter you decide what happens next.
Public pages like this one are never explicit. To see how it works, read about interactive erotic stories or the AI smut writer, or see stories by theme, from erotica for women to erotica for couples.
Questions
What does smut mean in books?
In books, smut means explicit sex scenes written on the page rather than skipped. Readers mostly use it for romance with detailed sex scenes, and often use it fondly: “this one has great smut” is a recommendation.
What is the difference between smut and erotica?
Erotica is a genre where the characters’ sexual experiences are the story. Smut is slang for any explicit writing, so it covers erotica and spicy romance alike. A romance is usually about the relationship and ends happily; erotica has no such rule.
What does “spicy” mean in books?
Spicy describes how explicit a book’s sex scenes are. Readers often rate spice from one to five chili peppers, from kissing only up to very explicit and frequent scenes.
What does PWP mean?
PWP stands for “plot, what plot?” or “porn without plot”. It comes from fan fiction and means a story that exists mainly for its sex scenes, with very little story around them.
Is smut the same as porn?
They’re close cousins. Both are made to be sexually explicit, but smut almost always means writing, while porn usually means pictures or video. Readers tend to use “smut” for stories with characters and a plot around the explicit scenes.
Updated November 1, 2026. Written with AI at metime. Examples on this page were written for it; every character in them is an adult.