Definitionen
1.NounAnything light, soft or fuzzy, especially fur, hair, feathers.
2.NounAnything inconsequential or superficial."That article was basically a bunch of fluff. It didn't say anything substantive."
3.NounA lapse or mistake, especially a mistake in an actor's lines.
4.NounA cloth diaper.
5.NounMarshmallow creme."That New England-style salami and fluff sandwich sure hit the spot!"
6.NounA passive partner in a lesbian relationship.
7.NounA fart. (Can we add an example for this sense?)
8.NounFan fiction, or part of a fan fiction, which is sweet and feel-good in tone, usually involving romance.
9.NounA form of roleplaying which is inconsequential and not related to the plot; often used in the context of (but not limited to) filling time.
10.NounShort change deliberately given by a railway clerk, to keep back money for himself.
11.VerbTo make something fluffy."The cat fluffed its tail."
12.VerbTo become fluffy, puff up.
13.VerbTo move lightly like fluff.
14.VerbTo make a mistake in one's lines.
15.VerbTo do incorrectly, for example mishit, miskick, miscue etc.
16.VerbTo break wind, to fart.
17.VerbTo arouse (a male pornographic actor) before filming.
18.VerbTo bring to a state of excitement.
19.VerbTo deliberately shortchange (a railway customer) and keep the money for oneself.