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psycho

adjectivenounnouncommon in dialogue

  • Canada//ˈsaɪ̯.koʊ̯//
  • Australia//ˈsaɪ̯.kəʊ̯//

Psychotic, psychopathic, or (broadly) otherwise insane.

adjective

  1. 1

    Psychotic, psychopathic, or (broadly) otherwise insane.

    That psycho jawn had snuck a pistol into the gym while we was practicing and started shooting shit up like she was some kinda hot female action hero.

    Oh, she's sweet but a psycho / A little bit psycho / At night she's screamin' / "I'm-ma-ma-ma out my mind"

Etymology

Clipping of psychotic or psychopath + -o (“person with characteristic”). Compare sicko.

noun

  1. 1

    slangA person who is psychotic, psychopathic, or (broadly) otherwise insane.

    The loony bin up on the hill is full of psychos.

    Oh, she's hot but a psycho / So left but she's right, though / At night she's screamin' / "I'm-ma-ma-ma out my mind"

  2. 2

    slangA 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.

noun

  1. 1

    informalA class, at a college or university, in which psychology is taught.

    I've got anthro, socio, lunch, and psycho.

Etymology

Clipping of psychology.

Forms

plural
psychos
comparative
more psycho
superlative
most psycho
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).