English

Definition of psycho noun from the Oxford Advanced Learner's Dictionary

 

psycho

 noun
noun
BrE BrE//ˈsaɪkəʊ//
 
; NAmE NAmE//ˈsaɪkoʊ//
 
(pl. psychos) (informal) Describing strange traits
 
jump to other results
a person who is mentally ill and who behaves in a very strange violent way In his new film, he plays the part of a crazed psycho. Don’t let him drive—he’s a complete psycho behind the wheel! See related entries: Describing strange traits Word Origin 1930s: abbreviation.
See the Oxford Advanced American Dictionary entry: psycho