psy·​cho | \ ˈsī-(ˌ)kō How to pronounce psycho (audio) \
plural psychos

Definition of psycho

: a deranged or psychopathic person not used technically

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Other Words from psycho

psycho adjective

Examples of psycho in a Sentence

He plays a drug-dealing psycho in the movie. a story based on a real-life psycho who had serious mother-son issues
Recent Examples on the Web In Taxi Driver, a psycho stalks a presidential candidate with intent to murder him, slinks away because security looks threatening, then decides to murder a pimp and others responsible for the degradation of a child prostitute. Kyle Smith, National Review, "The Politics of Joker," 5 Oct. 2019 Sometimes, if the neighbor is loud enough for long enough, a coward can transform into a psycho. Caity Weaver, New York Times, "How to Make Your Work-Neighbors Be Quiet (In 3 Lies or Less)," 2 Apr. 2020 The performers, including Betty Gilpin as a psycho cop and RonReaco Lee as a conflicted rapper-criminal, dive into their half-baked roles with anything-goes energy, but to diminishing returns. Gary Goldstein, Los Angeles Times, "Review: ‘Coffee & Kareem’ is one bitter cup of comedic joe," 3 Apr. 2020 Homegrown Nazi psycho Travis Leich (Greg Austin) calmly delivers wicked white-supremacist monologues in between calmly committing horrific acts of violence. Judy Berman, Time, "Amazon's Nazi-Killer Epic Hunters Can't Tell the Difference Between Vigilante Justice and Equal-Opportunity Sadism," 17 Feb. 2020 Of course, Doc is a psycho genius with all of his plays. Mark Medina, USA TODAY, "Clippers' 2019 playoff loss to Warriors 'helped' Kawhi Leonard make decision," 25 Oct. 2019 Rush is a clinical health psychologist who has completed mindfulness training at Duke’s Integrative Wellness Center and has been involved in research on the psycho-physiological effects of mindfulness interventions. Shirley Macfarland, cleveland, "Get spooked at Spotlights Theater’s Local Lore Ghost Walk: Talk of the Towns," 11 Oct. 2019 The program promotes a healthy, active lifestyle and provides organized opportunities for physical fitness, wellness education, and psycho-social empowerment among breast cancer survivors and their supporters through the sport of dragon boating. Cindy Kent,, "Breast cancer awareness events in South Florida," 23 Sep. 2019 At one property, police seized approximately 31,200 vape cartridges, each filled with 1 gram of oil containing tetrahydrocannabinol (aka THC, the psycho-active ingredient in cannabis). Beth Mole, Ars Technica, "Black-market THC-vape operation busted in Wisconsin, police say," 12 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'psycho.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of psycho

1942, in the meaning defined above

History and Etymology for psycho

short for psychopath

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Time Traveler for psycho

Time Traveler

The first known use of psycho was in 1942

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Statistics for psycho

Last Updated

22 May 2020

Cite this Entry

“Psycho.” Dictionary, Merriam-Webster, Accessed 1 Jun. 2020.

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More Definitions for psycho


How to pronounce psycho (audio)

English Language Learners Definition of psycho

informal : a person who is mentally ill and often dangerous or violent


psy·​cho | \ ˈsī-(ˌ)kō How to pronounce psycho (audio) \
plural psychos

Medical Definition of psycho

: a deranged or psychopathic individual not used technically

Other Words from psycho

psycho adjective

More from Merriam-Webster on psycho

Thesaurus: All synonyms and antonyms for psycho

Britannica English: Translation of psycho for Arabic Speakers

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