greaser Meaning, Definition & Usage

  1. noun (ethnic slur) offensive term for a person of Mexican descent
    wetback; taco.

WordNet

Greas"er noun
Definitions
  1. One who, or that which, greases; specifically, a person employed to lubricate the working parts of machinery, engines, carriages, etc.
  2. A nickname sometimes applied in contempt to a Mexican of the lowest type. Low, U. S.

Webster 1913