American slang adjective meaning monumentally stupid — 'dumb' cranked up with the emphatic 'ass' intensifier for extra punch. 'Dumbassed' goes beyond regular dumb; it implies a quality of stupidity that is almost impressive in its scope. It's the adjective form of 'dumbass,' used to describe decisions, situations, people, or ideas that display a remarkable lack of common sense. Very much at home in informal American speech, online rants, and anywhere someone needs a vivid, direct way to express exasperated disbelief.
He locked his keys in the car for the third time this month, which everyone agreed was a truly dumbassed move.
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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.
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(US, vulgar, slang) stupid.
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