abnormal bereft of reason brainsick crackbrained cracked crazed crazy daft deluded demented deprived of reason deranged disarranged disjointed dislocated disoriented displaced distraught flighty hallucinated insane irrational loco lunatic mad maddened manic mazed mental mentally deficient meshuggah moon-struck non compos non compos mentis not all there not right odd of unsound mind off out out of gear out of joint psycho queer reasonless senseless sick stark-mad stark-staring mad strange tetched touched unbalanced unjointed unsane unsettled unsound wandering witless