Nouns

(n)fluffany light downy material
(n)bagatelle, fluff, frippery, frivolitysomething of little value or significance
(n)fluffa blunder (especially an actor's forgetting the lines)

Verbs

(v)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 upmake 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”
(v)ruffle, flufferect or fluff up“the bird ruffled its feathers”
(v)tease, fluffruffle (one's hair) by combing the ends towards the scalp, for a full effect