abnormal arrested babbling backward bereft of reason blithering brainsick burbling crackbrained cracked crazed crazy cretinistic cretinous daft deluded demented deprived of reason deranged disoriented distraught dithering driveling drooling flighty half-baked half-witted hallucinated idiotic imbecile imbecilic insane irrational loco lunatic mad maddened manic maundering mazed mental mentally defective mentally deficient mentally handicapped mentally retarded meshuggah mongoloid moon-struck moronic non compos non compos mentis not right odd of unsound mind off psycho queer reasonless retarded senseless sick simple simpleminded simpletonian slobbering stark-mad stark-staring mad strange subnormal tetched touched unbalanced unhinged unsane unsettled unsound wandering witless