Fluff usually refers to a short piece of fanfic which is a little bit silly and quite cute. Often fluff-fics involve light romance, but not gratuitous sex, and may well focus on simple, everyday expressions of love.
Examples of fluffy plots are:
- Lily and James Potter looking after baby Harry.
- Elladan and Elrohir playing practical jokes.
- Susan Sto Helit and Death having a family Hogswatch.