alien aliene bedlamite borderline case case character crackbrain crank cuckoo dement demoniac ding-a-ling dingbat eccentric energumen erratic fanatic flake fou freak harebrain hermit hobo idiot kook lone wolf loner loon loony lunatic madman maniac maverick meshuggenah natural noncompos nonconformist nut odd fellow oddball oddity original outsider pariah phrenetic queer duck queer fish queer specimen rara avis raving lunatic recluse screwball solitary strange duck tramp type weirdo zealot