Gringo

Among Latin Americans, gringo is a term for a “foreigner,” often a white person from the United States. It can also refer to a person who doesn't speak Spanish or is out of touch with Latin culture, including people of Hispanic descent.

The story goes that the U.S. military wore green coats when they were marching through Mexican territory. In response, the Mexicans would say, “Green go home!” These words meshed together and the word gringo was born.