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A homosexual activity, which involves an individual "Jacking off" a minimum of 10 other gentlemen in a single night/party/event. Only once all 10 men have ejaculated can the act be called a Jackzacker.
Brad: Last night at the club i Jacked off 15 blokes
Shane: thats a great Jackzacker-ing
Brad: yep once I hit 12 my right wrist got sore so I had to use left
Shane: is that a record?
Brad: yep my jackzacker record was 13 not its 15!
by The park 9 pussy pounder January 12, 2017
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