A person who acts in a bizarre or dangerous manner.
A class, at a college or university, in which psychology is taught.
A person who is psychotic or otherwise insane.
Psychotic or otherwise insane.
One who behaves in a crazy manner.
A pitch thrown with added pressure by the index finger and a twisting wrist motion resulting in a motion to the right when thrown by a right-handed pitcher.
Crazy, offbeat, bizarre, zany, or weird.