Is a person of Mexican descent who hides or rejects his/her Mexican heritage.
An example of a Mexican-In-The-Closet;

Sarah: "Hey Pancho, Are you Mexican?"
Pancho: "I'M NOT MEXICAN! Only my parents and grandparents are Mexican."
Sarah: "Oh, so you have Mexican background."
Pancho: "DUDE, I'M NOT MEXICAN! My ancestors are SPANIARDS!"
Sarah: "UH? WHAT EXACTLY ARE YOU?"
Pancho: "I'm American of Spaniard descent."
Sarah: "Yeah Right...Talk to you later."
by numberofnames August 12, 2011
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