n. & v.
n. 1 soft, light, feathery material coming off blankets etc. 2 soft fur or feathers. 3 sl. a a mistake in delivering theatrical lines, in playing music, etc. b a mistake in playing a game.
v. 1 tr. & intr. (often foll. by up) shake into or become a soft mass. 2 tr. & intr. colloq. make a mistake in (a theatrical part, a game, playing music, a speech, etc.); blunder (fluffed his opening line). 3 tr. make into fluff. 4 tr. put a soft surface on (the flesh side of leather). bit of fluff sl. offens. a woman regarded as an object of sexual desire.
[ prob. dial. alt. of flue fluff ]