3. (verb)fluff a blunder (especially an actor's forgetting the lines)
4. (verb)botch, bodge, bumble, fumble, botch up, muff, blow, flub, screw up, ball up, spoil, muck up, bungle, fluff, bollix, bollix up, bollocks, bollocks up, bobble, mishandle, louse up, foul up, mess up, fuck up make a mess of, destroy or ruin "I botched the dinner and we had to eat out"; "the pianist screwed up the difficult passage in the second movement"
5. (verb)ruffle, fluff erect or fluff up "the bird ruffled its feathers"
6. (verb)tease, fluff ruffle (one's hair) by combing the ends towards the scalp, for a fulleffect
Definition of 'fluff'
Webster Dictionary
1. (noun)fluff nap or down; flue; soft, downy feathers