what are psycho
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. Although the word has long been used as a prefix in words like psychologist, the pejorative term for a psychopath has only existed since the twentieth century. The word gained further notoriety after the 1960 release of Alfred Hitchcock's thriller, Psycho.
Quick Review: 1  Psychology is the scientific study of human thought, feelings and behavior. 2  The five major perspectives in psychology are biological, psychodynamic, behavioral, cognitive and humanistic. 3  Each perspective provides its own view on the roots of why you do what you do.