1. greaser - Noun
2. Greaser - Proper noun
One who, or that which, greases; specifically, a person employed to lubricate the working parts of machinery, engines, carriages, etc.
A nickname sometimes applied in contempt to a Mexican of the lowest type.
Source: Webster's dictionary“The old Roadhouse bands were these rockabilly greaser types, all in black, so I had the band wear black. Source: Internet
The greaser villains, led by Bo Hopkins, have the traditional approach to any problem in interpersonal relations: "Tie him to a car and drag him." Source: Internet