fluff

I UK [flʌf] / US noun
Word forms "fluff":
singular fluff plural fluffs

1) [uncountable] very small pieces of hair, dust, or cloth that stick together or to the surface of something else

2) [uncountable] soft light fur or feathers from a young animal or bird

3) [countable] informal a small mistake that you make when you are speaking or reading to an audience

4) [uncountable] mainly American something that is entertaining but not serious or important

That film was pure fluff.

II UK [flʌf] / US verb [transitive]
Word forms "fluff":
present tense I/you/we/they fluff he/she/it fluffs present participle fluffing past tense fluffed past participle fluffed

1) fluff or fluff up or fluff out to shake something so that more air goes into it and it becomes larger and softer

Fluff the pillows after you use them.

When he's frightened, the cat fluffs up his tail.

2) informal to do something badly

She started to fluff tasks that should have been childishly simple.

fluff your lines (= say them badly when acting in a play):

Try not to fluff your lines!