(transitive) To plump up.
Fluff up the pillows to get the bed ready for guests.
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(slang) To make a gaffe or blunder; to fuck up.
I fluffed up on that tricky ski jump.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.