When a fellow prison inmate gives a little unconsenting affection to the anus of another inmate. i.e. prison butt rape.
MORENO: Ever had your shit pushed in?
JAKE: What?
MORENO: I had my shit pushed in.
SNIPER: Me too. My shit's been puuushed in.
Smiley?
SMILEY: (grins) I'm always gettin' love from the homies.