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bum-pumping

A male who pokes another males ass relentlessly with his piece
Mike was bum-pumping Liam
bum-pumping by 7841sugnuf May 26, 2010
Related Words
To inflate a woman's anal canal by pumping one's phallus in and out. The air pressure created by the pumping will result in a massive expulsion of the air once the phallus is removed.

The expelled air often has a minty aroma and tastes mildly sweet.
1. I bumpumped her and the sweet essence of heaven was emitted.

2. She was bumpumping me while i bumpumped the hell out of the girl in front.
bumpump by KorrrrrrnHuska December 14, 2009