The place on one's person (anus) where you would smuggle items in and out of prison...
my baby's mama was able to sneak me 4 packs of smokes and a connect 4 game pass the gaurds by using her ample sized prison pocket
by jmgiggity September 21, 2011
2 more definitions
1. An elusive hiding place used for smuggling illegal substances into "the big house".
"No I don't have any weapons...oh wait.....it's in my prison pocket."
by Garret_ September 17, 2008
someone's butt hole
Jim smuggled it in his prison pocket.
by Fat City 42 September 17, 2008