psychopath
/sɪˈkɒpəθ/Definitions
1. noun
A person having a severe mental disorder characterized by a tendency to engage in antisocial, often aggressive behavior, and a lack of empathy or remorse for one’s actions.
“The detective was investigating a series of violent crimes committed by a psychopath who seemed to take pleasure in the suffering of others.”
2. noun
A person whose behavior is antisocial and aggressive, but not necessarily a clinical psychopath.
“After the bar fight, the bouncer described the perpetrator as a psychopath, but later clarified that he meant the man was just very aggressive and not necessarily a clinical case.”