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crackbrain

noun
crack·​brain | \ ˈkrak-ˌbrān How to pronounce crackbrain (audio) \

Definition of crackbrain

: an erratic person : crackpot
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Other Words from crackbrain

crackbrained \ ˈkrak-​ˈbrānd How to pronounce crackbrained (audio) \ adjective

Synonyms for crackbrain

Synonyms

bug, crazy, fool, fruitcake, head case, loon, loony, lunatic, maniac, nut, nutcase, nutter [British slang], psycho, psychopath, sickie, sicko, wacko (also whacko)

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Examples of crackbrain in a Sentence

once a brilliant dancer, he died a crackbrain in a mental institution a crackbrain who wore bedroom slippers to the grocery shop

First Known Use of crackbrain

circa 1570, in the meaning defined above

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