Mouth Plumbing

Verb- The act of unclogging your girlfriends/ boyfriends asshole when they are constipated. To do this you must place your mouth firmly against their bare asshole and suck until you fell light headed, at this point you must go back in and finish the job by inhaling all of their feces.

My girl had a mean stomach ache so I stepped in and started mouth plumbing. She feels much better now but my mouth is full of shit.