Grumpy Blumpkin 

Combination of the Grumpy Munchkin and the Blumpkin.
When a woman sits on toilet and takes a shit while a guy sits in her lap and shits into the toilet while the girl is reaching around with her mouth and giving him a blowjob.
Woman has to be on the bottom incase of horrendous taco shits.
Female flexibility is key!

Big Cat: Hey you know that really skanky waitress from that restaurant.
Little Cub: yeah. What about here?
Big Cat: Big Cat totally got the Grumpy Blumpkin from her.
Little Cub: NFK

Grumpy Blumpkin by little cub September 24, 2009

upper deck grumpy blumpkin 

When a man is taking a shit in the toilet tank while receiving a blowjob from a woman who is shitting into the toilet bowl but reversed and facing the tank.

James Bond went to the Opera and met Bridget Jones, they proceeded to the rest room where they engaged in an Upper Deck Grumpy Blumpkin.

upper deck grumpy blumpkin by MeatBagTaco March 19, 2009