Quick definitions from WordNet (fluff)
▸ noun: a blunder (especially an actor's forgetting the lines)
▸ noun: any light downy material
▸ noun: something of little value or significance
▸ verb: make a mess of, destroy or ruin
▸ verb: ruffle (one's hair) by combing towards the ends towards the scalp, for a full effect
▸ verb: erect or fluff up
▸ Also see fluff
▸ noun: a blunder (especially an actor's forgetting the lines)
▸ noun: any light downy material
▸ noun: something of little value or significance
▸ verb: make a mess of, destroy or ruin
▸ verb: ruffle (one's hair) by combing towards the ends towards the scalp, for a full effect
▸ verb: erect or fluff up
▸ Also see fluff