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.
by AFNLD December 15, 2010
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When a dude sticks his long, hard, throbing cock in a womans ass then pulls out and pee's in her mouth.
Hey man, what did you do last night?

I gave this chick a dirty ass pump; it was awesome.
by CoolBreeze420 September 1, 2008
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Moving your ass whether it be at work, home or even in church
Me: Hey Sharon how are you today?

Sharon: FUCKING AWESOME, I'VE BEEN PUMPING ASS ALL MORNING!

Me: ummm... that's good..
by Marks920 July 22, 2016
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