a novel (1991) by Bret Easton Ellis about a young man living in Manhattan who is a psychopath (= a person suffering from a serious mental illness that causes them to behave in a violent way towards other people). The story was made into a popular film in 2000.
AMERICAN PSYCHO
Meaning of AMERICAN PSYCHO in English
Oxford guide to British and American culture English vocabulary. Руководство по британской и американской культуре, Оксфордский английский словарь. 2005