n. 25B6; noun LUNATIC, maniac, psychotic, psychopath; informal loony, nut, nutcase, head case, psycho; Brit. informal nutter; N. Amer. informal screwball.
MADMAN
Meaning of MADMAN in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012