(colloquial or derogatory) Psychotic or otherwise insane.

(derogatory, slang) A person who is psychotic or otherwise insane. / (derogatory, slang) A person who acts in a bizarre or dangerous manner.

(informal) A class, at a college or university, in which psychology is taught.

Relating to the soul, the mind, or to psychology.

plural of psycho

(informal) Synonym of hagsploitation

(philosophy) One who believes in psycho-functionalism.

(philosophy) A form of functionalism (philosophical paradigm of mind) based on the rejection of behaviorist theories in psychology and their replacement with empirical cognitive models of the mind.

(uncountable) The study of the human mind. / (uncountable) The study of human behavior. / (uncountable) The study of animal behavior.

An expert in the field of psychology.