KOOKY /ˈkuːki/ ► audio Scrabble 16 Words With Friends 15 Definition adjective informal or slang terms for mentally irregular. — synonyms: balmy, barmy, bats, batty, bonkers, buggy, cracked, crackers Examples “His kooky behavior seemed charming at first, but soon got on our nerves.” See all 5 words you can make from KOOKY → 5-letter words Words starting with K Words ending with Y ← Unscramble different letters