Gringa

(from Pg 169 in NextText)

Gringa (the feminine form of the word gringo) is a term often used by those in Latin American countries to describe someone who is a foreigner or white. There has been some debate amongst English speakers whether or not the term is offensive: gringa can be used in a derogatory way, but also may be used in a matter-of-fact tone to describe that someone is a foreigner. Because the word gringa is connotative of outsider, it is used negatively amongst Hispanic immigrants into the U.S. in describing whether a fellow Hispanic is "acting white." Despite the controversy regarding this word, it remains a standard part of the Spanish language.

References:
1. http://www.answers.com/topic/gringo
2. http://en.wikipedia.org/wiki/Gringo