1. The act of fucking ones anus while the other shits, making a brown squishy substance which both partners eat afterwards.

2. Eating ones shit then spitting it back into their anus then proceeding to fuck until you cum into the mixture.
"Edwin, Dean and I just did a backdoor meatpie"
"How was it?"
"Taste like shit!"
by Two Legged Twat Monkey September 19, 2016
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