MANIAC
—none. 1 colloq. Person behaving wildly (too many maniacs on the road). 2 colloq. Obsessive enthusiast. 3 person suffering from mania. —adjective of or behaving like a maniac. ? maniacal adjective. Maniacally adv. -maniac combination. Form forming adjectives and nouns meaning ‘affected with -mania’ or ‘a person affected with -mania’ (nymphomaniac).