A wooded area, usually in a forest that is littered with porno magazines. A porn pit is a common area that juveniles dump porno's taken from their parents homes. It can also be created by a creepy middle aged man (or your older brother), then stumbled upon by juveniles.
"I found a porn pit in the woods behind the grocery store... there were pictures cut out of porno's and hung on tree branches".
by Middle Aged Man with Mustache December 8, 2011