n. 25B6; noun
a homicidal maniac : LUNATIC, madman, madwoman, psychopath; informal loony, fruitcake, nutcase, nut, psycho, head case, headbanger, sicko; Brit. informal nutter; N. Amer. informal screwball, crazy, meshuggener.
(informal) a football maniac : ENTHUSIAST, fan, devotee, aficionado; informal freak, fiend, fanatic, nut, buff, addict.