The dirty burger
The Dirty Burger is when you shove raw hamburger meat into a girls asshole.

After you shove the meat in she then pushes it back out into a bowl or plate as if she's taking a shit. You then take the meat and form it into a hamburger patty and cook it on the grill to your liking, you then put it on a bun and eat it. You now have created The Dirty Burger.
John - "hey Mary can we make The Dirty Burger?"

Mary - "What's The Dirty Burger?"

John - " The Dirty Burger is when I shove hamburger meat into your asshole and you push it back out and I make a hamburger out of the meat and eat it"

Mary - That sound really kinky let's try The Dirty Burger"