1) When a man is about to nail a woman anally but finds, to his dismay, that there is already a butt-plug situated in the confines of her anal region. She is a No Parking Zone
2) A helpful reminder that women in this state can wear on a sign around their necks
1) John (in his head): "Oh boy, I think I can sneak my Johnson in her ass tonight!" Upon finding a butt-plug conveniently (for Sarah) located in her shitter, he exclaims: "Aww! This bitch has a no parking zone!"
2) Steven: O dude! I would love to stick my custard-launcher into her butt!
Kareem: Hate to burst your bubble bro, but she has a "no parking zone" sign on her neck.
Steven: aww man. o well, lets smoke some bud
Kareem: That's the spirit!