An ass that is even flatter, and even more embarrassing than a poohbutt. The absolute worst type of butt to have, or to look at. It practically tilts inward.
Man A: “Look at that poohbutt!” Man B: “No, dude, that’s a pooterbutt right there.”
“Omg, Becky, would you call my complete lack of having any ass a ‘poohbutt’? Or is it a ‘pooterbutt’?”
by NurseCaca December 7, 2018
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