Definition of psycho in English:

psycho

noun

informal
  • A psychopath.

    • ‘Kleptomaniacs, kitchen drinkers, Fatal Attraction type psychos, obsessive-compulsives, and other problem individuals are usually discovered in this phase.’
    • ‘It's unpleasant, but it's more unpleasant to be faced with true psychos / junkies on the subway.’
    • ‘Second, my best friend and crush is being stalked by crazy, murderous psychos.’
    • ‘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.’
    madman, madwoman, mad person, deranged person, maniac, lunatic, psychotic, sociopath
    View synonyms

Origin

1930s: abbreviation.

Pronunciation:

psycho

/ˈsīkō/