D defs.my
Entry 2 senses Webster, 1913

wetback

· wet·back · IPA /ˈwɛtbæk/
01 n. A Mexican who enters the United States illegally, by wading across the Rio Grande; -- disparaging and offensive.
  1. 1.
    A Mexican who enters the United States illegally, by wading across the Rio Grande; -- disparaging and offensive.
  2. 2.
    An offensive term for a person of Mexican descent, usually intended and considered as an ethnic slur.
Syn. greaser, taco.