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a person exhibiting extreme symptoms of wild behavior, especially when violent and dangerous. "a homicidal maniac" an obsessive enthusiast. "a gambling maniac" synonyms: enthusiast, fan, devotee, aficionado; informalfreak, fiend, fanatic, nut, buff, bum, addict "a techno maniac" Psychiatryarchaic a person suffering from mania. synonyms: lunatic, madman, madwoman, psychopath; informalloony, fruitcake, nutcase, nutjob, nut, fruit loop, psycho, mental case, head case, sicko, screwball, crazy, loon "a homicidal maniac"
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