25B6; noun (informal) MANIAC, lunatic, madman, madwoman; informal loony, nut, nutcase, fruitcake, crank, crackpot; Brit. informal nutter; N. Amer. informal screwball, crazy, kook, wacko; N. Amer. & Austral./NZ informal dingbat.
HEAD CASE
Meaning of HEAD CASE in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012