Top Definition
"jap dat" has its origins rooted in the australian city of Melbourne. jap dat is a casual tournament of american football between students from two schools. it is arranged by students and is often played on the weekends, there are also jap dat fights were two students put boxing gloves and spa for three rounds.
"hey jim are you playing in Jap Dat on sunday"
by michael humphrey May 26, 2008

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