Exhibiting the behaviors and personality traits of a psychopath.

(dated) A psychopath.

In a psychopathic manner.

plural of psychopathic

A person with a personality disorder indicated by a pattern of lying, cunning, manipulating, glibness, exploiting, heedlessness, arrogance, delusions of grandeur, sexual promiscuity, low self-control, disregard for morality, lack of acceptance of responsibility, callousness, and lack of empathy and remorse. Such an individual may be especially prone to violent and criminal offenses.

plural of psychopath