'wetback' definitions:

Definition of 'wetback'

From: WordNet
noun
(ethnic slur) offensive term for a person of Mexican descent [syn: greaser, wetback, taco]

Definition of 'wetback'

From: GCIDE
  • wetback \wet"back\ n.
  • 1. A Mexican who enters the United States illegally, by wading across the Rio Grande; -- disparaging and offensive. [PJC]
  • 2. Hence: An offensive term for a person of Mexican descent, usually intended and considered as an ethnic slur. [WordNet sense 1]
  • Syn: greaser, taco. [WordNet 1.5]

Synonyms of 'wetback'

From: Moby Thesaurus