A blunder is an embarrassing mistake. Accidentally called your new boyfriend by your old boyfriend's name? Ouch. That's a blunder you don't want to repeat.

Has an embarrassing mistake ever made you feel like you’re stumbling around with your eyes closed? If so, it won’t surprise you to learn that blunder comes from the Old Norse word blundra, meaning to “shut one's eyes.” It wasn’t until the eighteenth century that blunder came to refer to a stupid or embarrassing mistake, or as a verb, to describe making such a mistake, as in “I tend to blunder when I'm nervous.”

Definitions of blunder

n an embarrassing mistake

bloomer, blooper, boo-boo, botch, bungle, flub, 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

v commit a faux pas or a fault or make a serious mistake

“I blundered during the job interview”
boob, drop the ball, goof, sin
Type of:
breach, break, go against, infract, offend, transgress, violate
act in disregard of laws, rules, contracts, or promises

v utter impulsively

“He blundered his stupid ideas”
blunder out, blurt, blurt out, ejaculate
Type of:
mouth, speak, talk, utter, verbalise, verbalize
express in speech

v make one's way clumsily or blindly

Type of:
go across, go through, pass
go across or through

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