Reverse Dictionary: MENTALLY UNBALANCED

ADJECTIVES
► ACROSS THE BRIDGE TO DARTMOUTH mentally ill, institutionalized → 1999 Can. sl.
► AIRY mentally unbalanced → M19 Irish sl.
► AWAY TO THE HILLS mentally unbalanced → 20C Irish sl.
► AWAY WITH THE FAIRIES day-dreaming, possibly drug-intoxicated, mentally deranged → 1996 Ireland sl.
► AWEDDE overcome with anger, madness, or distress; insane, mentally disturbed → a1000 obs.
► BEANY mentally defective, whether feeble-minded or insane → 1914 Amer. dial.
► BUGGY mentally deficient → 1905 Amer. dial. (Bk.)
► DAUNCY ► DONCY stupid; confused, dazed; mentally unstable → 1937 Amer. dial.
► DIPPY mentally unbalanced → 1913 Amer. dial. (Bk.)
► FLARED somewhat deranged mentally → 1918 Amer. dial.
► LOC insane, irrational, mentally unbalanced → 2001 African-American sl.
► LOC’D OUT insane, irrational, mentally unbalanced → 1995 African-American sl.
► NOT ALL THERE slightly mad; mentally or intellectually disadvantaged → 1864 UK sl.
► NOT HAVE BOTH OARS IN THE WATER to be stupid or mentally unbalanced → 1982 Amer. sl.
► NOT RIGHT mad, eccentric, mentally wrong → Brit. sl.
► OFF HIS HINGES mentally unsound → 1926 US sl. (Bk.)
► OFF HIS TROLLEY mentally unsound → 1926 US sl. (Bk.)
► OUT OF IT crazy, mentally ill → 1979 US sl.
► POGGLE ► PUGGLE mentally unbalanced, crazy → E20 military sl.
► PUNCHY applied disparagingly to any person, implying that he is confused, or mentally subnormal from, or as though from, blows on the head → 1974 Amer. sl. (Bk.)
► SEVEN-THIRTY insane or mentally unstable, esp. if dangerous → 1998 African-American sl.
► SICK mentally ill or disturbed, psychopathic, esp. in a sadistic way → 1950s US sl.
► TROPPO mentally disturbed → 1984 Aust. colloq. (Bk.)
► WANTING mentally deficient, weak-minded → 1877 Eng. dial.
► ZONKED confused, mentally impaired → 1960s sl.
► ZONKERS confused, mentally impaired → 1960s sl.
► ZONKY confused, mentally impaired → 1960s sl.

NOUNS
► ABALIENATION loss or failure of the mental faculties → 1652 obs.
► CHIPPY a mild mental illness → 1971 Amer. sl.
► DAFFING mental derangement, insanity → a1624
► INGENY mind, intellect, mental faculties; mental tendency, disposition → 1477 obs.
► WALNUT STORAGE DISEASE an unspecified mental problem → 1983 US sl.
► WANT any form of mental deficiency → 20C Irish sl.

NOUNS – PERSON
► BASKET CASE a person who is emotionally or mentally unable to cope, esp. because of overwhelming stress or anxiety; later, more generally, a person regarded as mentally unbalanced → 1953
► CABBAGE a brain-damaged or mentally subnormal person → 1987 colloq., offensive
► COUSIN BETTY a female beggar claiming or feigning insanity in order to obtain money; later, a woman who has a mental illness or intellectual disability → 1744 sl. obs.
► COUSIN TOM a male beggar claiming or feigning insanity to obtain money; a man who has a mental illness or intellectual disability → 1740 sl. obs.
► IDIOT a person so deficient in mental or intellectual faculty as to be incapable of ordinary acts of reasoning or rational conduct → a1300
► MONG an idiot; a fool; a mentally slow or backward person → 1980 Brit. colloq., offensive
► MONGY an idiot; a fool; a mentally slow or backward person → 2000 Brit. colloq., offensive
► NUTBAG a mentally unstable person → 1999 US sl.
► NUT JOB a mentally unstable person → 1972 US sl.
► OUTSIDER a mentally deficient person → 1900s Irish sl.
► RETARD a mentally retarded person → 1970 sl., orig. US derogatory
► SICKIE ► SICKY one who is mentally ill or perverted → 1973 Amer. sl.
► SICKO one who is mentally ill or perverted → 1977 Amer. sl.
► SPARKY a fool; a mentally handicapped person → 2003 UK sl. 
► TOM FOOL a man mentally deficient; a half-witted person → 1565 obs.
► VEDGIE ► VEG a moron; a madman; a stupid person; someone considered mentally deficient or brain damaged → 2001 sl., derogatory
► VEGETABLE a person who is mentally and physically incapacitated to a degree that renders the comparison with a plant organism fair if cruel → 1921 UK
► VEGGIE ► VEGGY ► VEGIE ► VEGY a moron; a madman; a stupid person; someone considered mentally deficient or brain damaged → 1989 sl., derogatory
► WACK JOB ► WHACK JOB a person who is mentally ill; an eccentric or insane person → 1979 US sl.
► WACKO ► WHACKO a person who is crazy, eccentric, or mentally imbalanced → 1977 US sl.
► WATERHEAD a person with mental problems → 1968 US sl.
► WHACKER a person who is seriously mentally unstable → 1965 Aust. sl.
► WITTY a fool; a mentally retarded person → 1940 Amer. dial.

VERBS
► GO TROPPO to become mentally unhinged, as if from exposure to a tropical climate → 1941 Aust. sl.
► HAVE A WANT to be mentally deficient → 1825 Sc.
► HAVE SOME PALINGS OFF THE FENCE to be mentally disturbed → 1999 Aust. sl. (Bk.)
► HAVE WHITE ANTS IN THE WOODWORK to be mentally disturbed → 1999 Aust. sl. (Bk.)
► NUT OUT to act mentally ill; to lose emotional stability → 1966 US sl.
► SLIP ONE’S TROLLEY to become mentally unbalanced or deranged → 1984 Aust. colloq. (Bk.)
► SNAP ONE’S TWIG to become mentally unstable. deranged or demented → 1984 Aust. colloq. (Bk.)
► WIG OUT to become mentally unbalanced; to lose one’s sanity → 1950s sl.