Any disease of the mind; the psychological state of someone who has emotional or behavioral problems serious enough to require psychiatric intervention

A personality disorder characterized by amorality and lack of affect; capable of violent acts without guilt feelings (`psychopathic personality' was once widely used but was superseded by `sociopathic personality' to indicate the social aspects of the disorder, but now `antisocial personality disorder' is the preferred term)

"Killing Time" is a song by American thrash metal band Megadeth.