Nutty | Definition of nutty by Merriam-Webster

Full Definition of NUTTY

1

: having or producing nuts

2

: having a flavor like that of nuts

3

: eccentric, silly; also : mentally unbalanced

— nut·ti·ly \-tə-lē\ adverb

— nut·ti·ness noun

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15th century

Synonyms: balmy, barmy [chiefly British], bats, batty, bedlam, bonkers, brainsick, bughouse [slang], certifiable, crackbrained, cracked, crackers, crackpot, cranky [dialect], crazed, crazy, cuckoo, daffy, daft, demented, deranged, fruity [slang], gaga, haywire, kooky (also kookie), loco [slang], loony (also looney), loony tunes (or looney tunes), lunatic, mad, maniacal (also maniac), mental, meshuga (or meshugge also meshugah or meshuggah), moonstruck, non compos mentis, nuts, insane, psycho, psychotic, scatty [chiefly British], screwy, unbalanced, unhinged, unsound, wacko (also whacko), wacky (also whacky), wud [chiefly Scottish]

1

: not showing good sense <a nutty idea>

2

: having a flavor like that of nuts

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