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XIII is 13 in roman numerals, M is the 13th letter in the alphabet which represents Mexico or the Mexican Mafia also known as La "EME"
by Brown huero December 30, 2003
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The first Cel shaded first person shooter from Ubi soft.....its not bad
Yo download XIII demo if ya dont believe me
by Anonymous August 17, 2003
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it can mean like when someone is peng or when your in a sticky situation
-xiiiii he’s so peng im gonna be his snap

-xiiiii your gonna get whipped when you get home
by ghazam September 04, 2019
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