Psychopath
Definition 1 of 3
Pro Tip 1/2
Violent Connotation
The term 'psychopath' implies dangerous behavior, not just mental illness. That movie villain is a classic psychopath, cunning and violent.
Pro Tip 2/2
Social Perception
'Psychopath' can stigmatize individuals; use it with caution in social contexts. Calling someone a psychopath in an argument can be very offensive.