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.
Someone perceived as odd, eccentric, and/or extreme.
Someone with crazy or extreme political views (especially extreme conservative views).
A member of the air force (in a town that hosts a USAF installation).
A mentally ill homeless person.
A deciduous tree of the genus Pterocarya native to Asia.