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: crazy, mad
fans went bonkers when their team won
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balmy, barmy [chiefly British], bats, batty, bedlam, brainsick, bughouse [slang], certifiable, crackbrained, cracked, crackers, crackpot, cranky [dialect], crazed, crazy, cuckoo, daffy, daft, demented, deranged, fruity [slang], gaga, haywire, insane, kooky (also kookie), loco [slang], loony (also looney), loony tunes (or looney tunes), lunatic, mad, maniacal (also maniac), mental, meshuga (or meshugge), moonstruck, non compos mentis, nuts, nutty, psycho, psychotic, scatty [chiefly British], screwy, unbalanced, unhinged, unsound, wacko (also whacko), wacky (also whacky), wud [chiefly Scottish]
balanced, compos mentis, sane, sound, uncrazy
Recent Examples on the Web
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bonkers.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
1945, in the meaning defined above
perhaps from bonk + -ers (as in crackers)
Resources for bonkers
5 Oct 2018
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by force of circumstances
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