reverse grumpkin 

when a person sitting on a toilet taking a shit gives oral sex to someone standing in front of them

yeah i got a grumpkin then gave her a reverse grumpkin

reverse grumpkin by Bradford, PA March 18, 2011

reverse grumpkin 

Same as a a grumpkin...A girl is taking the shit while the guy eats the girl out!

man! that was a good reverse grumpkin!

reverse grumpkin by Joe Davis September 11, 2003

Bump Grumpies 

Just like "Bump Nasty" or "Bump Uglies".

Hey let's go bump grumpies then get some food.

Bump Grumpies by Faelan January 20, 2007

grumpkin 

one of a variety of individuals, who is bubbly like a volcano, snuggly as an antitank mine, and enjoys hillsides of cabot extra sharp cheddar cheese. as much as any such individual can enjoy such things, which is quite an excessive amount.

"Antitank mines always have to be stabilized before you grab them. This is why I kiss you at the same time.What a grumpkin!"

grumpkin by J Jayma Jameson August 16, 2011

grumpkin 

When Female or Male, is performing oral sex on you when you are taking a shit on the toilet. Grumpkin is mistaken for the word Blumpkin, because of the Movie "Harold and Kumar."

Grumpkin

grumpkin by The Theoretically Correct May 20, 2009

grumpkins 

recieving head while in the process of shitting.

"That bitch was so nasty she gave me grumpkins!"

grumpkins by mattneesy May 19, 2004

Grumpkin 

A twist and flick of the balls while receiving a blowjob, thus making the person grumpy.

Garrett was getting a BJ when Amy decided to bust out the grumpkin.

Grumpkin by sqwirll April 14, 2009