1.Men racing for 26.2 miles while trying to jizz as much as possible.

2. Racing rockets powered by jizz.

3. Jerking off with a group of guys to see whose jizz goes the furthest
1. Man, that masturbathon was crazy...how the hell can they endure all that?

2. "That looks like a giant..." "Wang! Pay attention!...I was distracted by an enormous flying..."

3. Main...dat boy shot 30 feet at the masturbathon
by Mac Daddy Kings May 12, 2003
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Not to be confused with masturbathong, a masturbathon is a marathon in which one masturbates constantly for a set period of time. Can also be the opposite in which one does NOT masturbate for a certain period of time.
Guy 1: Hey man, I'm going to go on a masturbathon tonight.
Guy 2: Nicee, good luck.
by fubawss January 09, 2011
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The art of masturbating at a rate of over 6 times per hour, for a duration of at least 3 hours.
Girl : Hey honey! Wanna go see that horrible, boring, cocksucking movie, 50 shades of grey with me tonight?
Boy : Nah Bitch I'm havin' a masturbathon
by FireCrotchAnnelieMaurice March 12, 2015
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