Anything light, soft or fuzzy, especially fur, hair, feathers.

Anything inconsequential or superficial.

“That article was basically a bunch of fluff. It didn't say anything substantive.”

A lapse or mistake, especially a mistake in an actor's lines.

To make something fluffy.

“The cat fluffed its tail.”

To become fluffy, puff up.

To move lightly like fluff.