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1.
To cram more people into a car than is recommended by the automobiles maker.
Once me and my friends crammed our intire class of 13 people into a 5 seater. It was so mexicanized.
by Wegunna Tinkle August 20, 2005
 
2.
To add cheese to a usually cheese-less food, because obviously cheese goes with everything, and it's common in most Mexican foods... no offense Mexicans.
"Dude, you should totally mexicanize that rice."
by Haters keep hatin November 08, 2011