abnormal bereft of reason brainsick catatoniac certifiable case crackbrained cracked crazed crazy daft deluded demented deprived of reason deranged disoriented distraught flighty hallucinated insane irrational loco lunatic mad maddened manic manic-depressive mazed mental mental case mentally deficient meshuggah moon-struck non compos non compos mentis not all there not right odd of unsound mind off paranoiac paranoid psychopath psychopathic case psychopathic personality psychotic queer reasonless schiz schizo schizoid schizophrenic schizy senseless sick stark-mad stark-staring mad strange tetched touched unbalanced unhinged unsane unsettled unsound wandering witless