Word Study
kook
OXFORD DICTIONARY
kook, n. & adj. US sl.
--n. a crazy or eccentric person.
--adj. crazy; eccentric.
--n. a crazy or eccentric person.
--adj. crazy; eccentric.
Etymology
20th c.: prob. f. CUCKOO
THESAURUS
kook
alien, aliene, bedlamite, borderline case, case, character, crackbrain, crackpot, crank, cuckoo, dement, demoniac, ding-a-ling, eccentric, energumen, erratic, fanatic, flake, fou, freak, harebrain, hermit, hobo, idiot, lone wolf, loner, loon, loony, lunatic, madman, maniac, maverick, meshuggenah, natural, noncompos, nonconformist, nut, odd fellow, oddball, oddity, original, outsider, pariah, phrenetic, queer duck, queer fish, queer specimen, rara avis, raving lunatic, recluse, screwball, solitary, strange duck, tramp, type, weirdo, zealotFor further exploring for "kook" in Webster Dictionary Online