A ridiculous challenge between male friends to determine who can ejaculate the most times within 24 hours.
Guy 1: I bet you guys can only jack off twice before you can't anymore!
Guy 2: Why don't we have a spermathon to determine who can do it the most!
Guy 2: Why don't we have a spermathon to determine who can do it the most!
by wanker69 March 10, 2012
Get the spermathonmug.