pumping mud 

pumping mud: Taking a wet shit (Diarrhea)

After I eat at JJ'S pizza I'll be pumping mud

pumping mud by Seemorebutts August 31, 2004

mud pumping 

the action of anal sexual relations to medicate constipation.

melissa was really constipated and had to get mud pumped; jose had to mud pump annie after she ate the twice baked spaghetti; howard was mud pumping the shit out of andrew after he ate his calzone.

mud pumping by robbartles May 20, 2010