A really freaky-lookin' person. Usually the person looks retarded and in space.

An adjective describing someone is being posed by a demon.

(adjective) used to describe an object that is broken, deformed, or not functioning properly

being demented simply means affected by craziness or insanity

From gay opera slang, as defined by Ethan Mordden:
Opera at its greatest, a night when the singers are in voice, in role, in glory. Everything fits.