The act of pumping the anus until shit splatters all over the pump-ee.
"I had an anal pump last night and shit all over Mark!"
by Relacuna September 25, 2013
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Similar to the Arabian Gas Pump, except urination takes place in the anal cavity instead of the vagina.
Colby loves to give chicks he meets the "Anal Gas Pump".
by AnonymousoftheDay November 12, 2011
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