psycho

Plural: psychos

Noun

• A mentally unstable person (informal, often derogatory).
• a person afflicted with psychosis
• A person who is psychotic, psychopathic, or (broadly) otherwise insane.
• A person who acts in a bizarre or dangerous manner.
• A class, at a college or university, in which psychology is taught.

Adj

• Psychotic, psychopathic, or (broadly) otherwise insane.

Examples

• His opponent’s aggressive Scrabble plays made him wonder if he was playing a PSYCHO.
• I've got anthro, socio, lunch, and psycho.
• She complained that he was a psycho for driving at such a high speed in heavy traffic.
• The loony bin up on the hill is full of psychos.

Synonyms

psychotic, psychotic person, creep, freak, loony, loose cannon, nutcase, wacko, weirdo