Buttphone

A buttphone is a (usually) small cellphone smuggled into prison inside an inmates rectal cavity (aka his "PK holder, aka his "Pooey Vuitton")

Inmate 1: "Yo, where's Lefty at?"
Inmate 2: "He's in his house, talkin' with his girl on the Buttphone. I'm keeping six."

by 806997F May 3, 2018