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When a woman is giving a hand job (alternatively blowing and simultaneously hand jacking a dude); at the moment he cums, she sucker punches him at full strength in the nuts - oddly enhancing the orgasm with a "jack-en-sac" surprise!
It was just another blowjob, until she Jackensacked me into an oddly painful bliss.
by Viral88 February 24, 2015
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