ass pumping - utilization of the buttocks in a general up and down motion to facilitate the use of a pump or other similar applied pressure working device. Definition may be inclusive of fully or partially clothed buttocks, or entirely unclothed buttocks.

Common devices used when ass pumping:
tire pump, beer keg "tap"

Expressions: "You can pump a keg with that ass!"

ass pumping by TCR May 22, 2006

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Madden Ass Pumping

The act of melting down a Madden CD and placing it into a syringe then injecting the hot liquid into one's ass like a steroid injection.

Adam melted Madden for Eric because the game was so garbage. Then Eric bent over and got an injection of Madden. This is Madden Ass Pumping.

Madden Ass Pumping by AFNLD December 16, 2010

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pumping ass

anal sex

Person 1: Hey, did you hear what Jason did the other day?
Person 2: No, what'd he do?
Person 1: He was totally pumping ass with Becky.
Person 2 : Goals.

pumping ass by lolingatyouandyourlife June 20, 2015

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