pumping a grumpy

1. fucking the shit out of an old dude until he has a heart attack

2. tryin to insert your dick into a frisky squirrel.

"I caught that whore fucking my grandpa!"
"Yeah man, she was pumping a grumpy"

"Last night i was pumping a grumpy, and the mother fucker bit me"

by Big Jerms July 27, 2005

Pumping a grumpy

Slang for having a bowel movement, pooping, taking a shit, etc

Bro where the hell were you, we lost the game because of you

Stfu, I was pumping a grumpy.

by Davehar March 29, 2025