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To fap for an exceedingly long amount of time, without stopping or breaks.

Additionally it is absolutely feasible to wear a smart watch while doing so in order to accumulate the elusive 27.2 miles on the pedometer, seemingly unreachable by modern fap theorists.
"I dont have shit to do tonight so when i get home, Stroke Marathon!" - Justin Weatherford
by HorseTheBootyFiller November 06, 2014
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