Occurs during the act of "doggy-style" sexual intercourse. When the giver attempts to enter the receiver's anus, without first requesting permission to do so. Usually resulting in the incompletion of said act.
"Homes trying to slip in, a back alley parkin' job on his woman. But she revoked his driver's licence!"
by D. Gould January 6, 2006
Get the back alley parkin'mug.