The act of shitting into a female’s vagina(or ass) and then proceeding to insert a phallic object. This phrase utilizes the slang “pipe” which typically means “to fuck”.
Johnny: Damn, it smells like a fucking farmhouse in here. What did you two do last night.”
Roger: Yo, we hit the sewage pipe on the bed, didn’t get it all out. My bad, but it was worth it.
I had to replace the entire mattress after sleeping with a broken sewage pipe. It was a Tempurpedic too - yes I know I can't afford to keep doing this mom please stop yelling