Smut is a word often a word used by the younger generation of
Millennials and GenZ. The word 'smut' is often used to describe sex or erotic materials (aka 18+ shit.) contained in fanfiction or books. This can also apply to art too but is usually the former.
Smut can be all kinds of sexual activity. This includes fetishes, omegaverse, and just
straight porn. Smut is also commonly referred to as Lemon, or Lime. Though
the definition of Lemon is very similar to Smut, Lime is referred to when sexual stuff is mentioned but now outright written in a story.
Td;Lr: smut is basically just porn usually in fanfiction form.
Person 1: Do you know the
fanfiction "Todoroki and the Special Night"? Its my favorite!
Person 2: Isn't that the one with the Smut...? You kinky bitch.
Person 3: What is smut?
Person 2: Smut is sexually
explicit content in a
fanfiction or book.
Person 3: Wow, Person 1 sure is kinky!"
Person 1: Hey!