When a dude in prison intentional shows the top of his ass by sagging his pants/ wearing a short shirt. Intended to attract lovers like when women show off their cleavage.
Inmate 1: Daaaaamn bro, did you see the top of Tyrell's ass just now.

Inmate 2: Oh hell yeah. Thas some nice prison cleavage. I'ma rape his ass good tonight.

Inmate 1: Lucky...
by ak2215 July 23, 2015
Get the Prison Cleavage mug.