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Jizzing A Numerous Amount of Times at Once.
"Dude our english teacher is so hott"
"Yeah, In her Hour-Long Class I Had A Jizzathon"
by ThenIJizzedNMyPants April 02, 2009
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An event in which men run a certain distance(varies) while jacking off along the way, thus jizzing all over the place.
guy one: dude how did the jizz-a-thon go?
guy two: it was great man, I jizzed at least 5 times in 2 miles.
by AyYoMaDood April 02, 2010
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