Psycho

Pronunciation

• IPA: /ˈsaɪkoÊŠ/
• Rhymes: -aɪkəʊ

Origin

Apocope of psychotic and psychopath.

Full definition of psycho

Adjective

1. (colloquial or pejoative) Psychotic, or otherwise insane.

Noun

1. (pejorative, slang) A person who is psychotic or otherwise insane.The loony bin up on the hill is full of psychos.
2. (pejorative, slang) A person who acts in a bizarre or dangerous manner.She complained that he was a psycho for driving at such a high speed in heavy traffic.
3. (informal) A class, at a college or university, in which psychology is taught."I've got anthro, socio, lunch, and psycho."

Synonyms

• (pejorative for a pyschotic or otherwise insane person) freak, loony, nutcase, wacko
• (pejorative for a person acting in a bizarre or dangerous manner) creep, freak, loose cannon, weirdo