A deranged person is someone who has a mental disorder that affects their behavior and thinking. A sociopath is a person with a personality disorder characterized by a lack of empathy and disregard for social norms. A MADMAN is someone who is mentally unstable and behaves erratically. A schizoid is someone who is emotionally detached and avoids social interaction. A PSYCHOPATH is someone with a personality disorder characterized by a lack of conscience and an inability to feel guilt or remorse. A PSYCHOTIC is someone who has a severe mental disorder that affects their ability to think, feel, and behave normally. A MANIAC is someone who is extremely excited or enthusiastic about something. A LUNATIC is someone who is mentally ill and behaves in an unpredictable manner. A NEUROTIC is someone who is anxious and prone to irrational behavior.