To flub something is to really mess it up. When a movie actor flubs his lines, the scene can be filmed again. But, if he's a stage actor, there's no way to fix the mistake.

Even a star basketball player flubs an easy layup sometimes, and the very best students occasionally flub a quiz. The mistake or blunder itself can also be called a flub: "The concert was terrible, full of flubs." The word's been around since the 1920's, possibly influenced by words like "fluff" and "flop," and definitely coined in the United States.

Definitions of flub

v make a mess of, destroy or ruin

n an embarrassing mistake

bloomer, blooper, blunder, boo-boo, botch, bungle, foul-up, pratfall
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the momentary juggling of a batted or thrown baseball
a blunder that makes you look ridiculous; used in the phrase `make a spectacle of' yourself
a serious and ludicrous blunder
fumble, muff
(sports) dropping the ball
a blunder (especially an actor's forgetting the lines)
faux pas, gaffe, gaucherie, slip, solecism
a socially awkward or tactless act
a glaring blunder
a conspicuous mistake whose effects seem to reverberate
misstep, stumble, trip, trip-up
an unintentional but embarrassing blunder
Type of:
error, fault, mistake
a wrong action attributable to bad judgment or ignorance or inattention

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