From Longman Dictionary of Contemporary Englishwackywack‧y, whacky /ˈwæki/ adjective informal STUPID/NOT SENSIBLEsilly in an exciting or amusing way SYN crazy a wonderfully wacky idea —wackiness noun [uncountable]
Examples from the Corpus
wacky• Would you rather put up with your condition than subject yourself to these wacky cures?• My guess is that you could dig up wacky facts about any animal, fruit or mineral you choose to look at.• And white jocks at the time were more into wacky humor.• I don't want to make the novel sound wacky, let alone conspiratorial.• And some records are more wacky than others.Origin wacky (1800-1900) → WHACK1 