¦ noun
1. soft fibres accumulated in small light clumps.
the fur or feathers of a young mammal or bird.
2. trivial or superficial entertainment or writing.
3. informal a mistake, especially in speech, sport, or music.
¦ verb
1. (usu. fluff something up) make (something) fuller and softer by shaking or patting it.
2. informal fail to accomplish (something) properly.
Origin
C18: prob. a dialect alt. of C16 flue 'down, nap, fluff', appar. from Flemish vluwe.