psy·cho 
/ˈsaɪkoʊ/ noun
plural psy·chos /ˈsaɪkoʊ/ noun [count] informal : a person who is mentally ill and often dangerous or violent : psychopath
▪ He plays a drug-dealing psycho in the movie.
▪ He plays a drug-dealing psycho in the movie.
— psycho adjective
▪ psycho creeps/killers ▪ She can turn psycho at any minute.
▪ psycho creeps/killers ▪ She can turn psycho at any minute.
