Origin of greaseballsee greaser (noun) a person of Mediterranean or Latin American origin: a term of contempt or hostility
- greaser (sense )
- (US, slang, pejorative, ethnic slur) A person of Italian descent.
Derived from the fact that Italian-Americans are stereotyped as having greasy or greased-up hair, e.g. John Travolta in Grease and Saturday Night Fever.