Best definition
The remaking of a foreign movie or TV series with Americans.

Ghost in the Shell isn’t whitewashing you retard, it’s yankwashing.

I’m so glad J.K. Rowling kept the Harry Potter cast British, yankwashing that movie would have ruined it.

yankwashing: define #2
When an actor who is not from the U.S. South is cast in the role of a Southerner, while actors with actual Southern dialects are not cast. The Southern character is, stereotypically, dim-witted, too.
Tom Hanks as Forrest Gump was a total case of yankwashing.