A skit on the Comedy Central show "Mind of Mencia" spoofing Brokeback Mountain. It starred Carlos Mencia and Mario Lopez playing two mexicans hiding who they are. They escape to the mountain to be true wetbacks.
Any Honduran or Salvadorian that lives in the U.S. is a triple wetback because they have to cross through Guatemala and Mexico, just to get to America.
When finishing sex, the male pulls out and cums on their partner's back, then licks the sperm and blows air on the area where he licked.
A is having sex with a girl doggy style and then finishes on her back, licks his jizz, and then blows air on the area, he just did a Tennessee Wetback.