wacko wackiness • wacky · · · Info · Definitions · Synonyms · Characters · · wacko · · Text Latin · · Script 5 · · Length 2 · · Syllables Definitions · · · (noun) a person who is regarded as eccentric or mad. Synonyms: nutter, whacko. · · Noun Definition 1 Synonyms · · · nutter · · Synonym 1 whacko · · Synonym 2 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 k latin small letter k U+006B o latin small letter o U+006F w latin small letter w U+0077