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When a man is fapping his genitals so hard his testicles begin to bounce.
"My fappersack made a large clapping noise after the slams!"
by XxSwagXxxX June 06, 2015
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When a man is fapping his genitals so hard his testicles begin to bounce.
"My fappersack made a large clapping noise after the slams!"
by XxSwagXxxX June 06, 2015
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Get a fappersack mug for your Uncle Vivek.