Definition of psycho in US English:


nounPlural psychos

  • A psychopath.

    • ‘I don't want to be put in there with a bunch of crazy psychos… I'm not a bad person.’
    • ‘The speech was basically: men are psychos, Americans are psychos, the Americans want to exterminate the planet, and naked protest will end the nuclear age.’
    • ‘Second, my best friend and crush is being stalked by crazy, murderous psychos.’
    • ‘It's unpleasant, but it's more unpleasant to be faced with true psychos / junkies on the subway.’
    • ‘Kleptomaniacs, kitchen drinkers, Fatal Attraction type psychos, obsessive-compulsives, and other problem individuals are usually discovered in this phase.’
    madman, madwoman, mad person, deranged person, maniac, lunatic, psychotic, sociopath
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1930s: abbreviation.