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: of, relating to, or being a person who is mentally or emotionally unsound or unstable especially in a way that results in dangerous or violent behavior. Synonyms. Noun. bug. crackbrain. crazy. fool. fruitcake. head case. loony. lunatic. maniac. nutcase. nutter [ British slang]
Psycho definition: a psychopathic or psychotic person.. See examples of PSYCHO used in a sentence.
psycho. adjective. informal uk / ˈsaɪ.kəʊ / us / ˈsaɪ.koʊ /. (of a person) crazy and frightening: He suddenly went psycho and started shooting in all directions. He plays a psycho killer who pushes a woman down a flight of stairs to her death. Fewer examples. I was in Ireland with my psycho family.
Psycho is a slang term for someone who is mentally unstable or afflicted with a psychosis. Your best friend risks looking like a psycho if she keeps stalking her ex-boyfriend months after their breakup. Psycho comes from the Greek word psykho, which means mental.
A psycho is someone who has serious mental problems and who may act in a violent way without feeling sorry for what they have done.
What does the word psycho mean? There are five meanings listed in OED's entry for the word psycho. See ‘Meaning & use’ for definitions, usage, and quotation evidence. psycho is considered offensive. psycho has developed meanings and uses in subjects including. psychoanalysis (1910s) psychiatry (1910s) See meaning & use.
Psycho Definition. A psychopath. (pejorative, slang) A person who is psychotic or otherwise insane. The loony bin up on the hill is full of psychos. (informal) A class, at a college or university, in which psychology is taught. "I've got anthro, socio, lunch, and psycho." Mentally deranged; crazy.