grumpkin

a mixture of a grundle grab and a knuckle butt fuck. it can be quite stimulating if used correctly

the wrestler used the grumpkin technique to score a reversal.
i blew my wad as soon as that filthy slut gave me a grumpkin.

by the cool breeze September 8, 2006

grumpkin

Describes sosmeone who suddenly turns extremely and uncharacteristically grumpy at night, particularly after midnight. Word evolved from pumpkin - someone who suddenely turns sleepy at midnight.

Watch out - after midnight she turns into a grumpkin!

by Grumpkin April 30, 2006

grossie grumpkins

The anonymous old man - most likely suffering from some form of dementia - who takes a shit in the sink of public restrooms

Don't go into the bathroom, Bob. It looks like Grossie Grumpkins struck again.

by Betty Wagaman October 15, 2006

Sankaty Grumpkin

Pro staff getting head while dropping a deuce in the cart barn bathroom by a first year caddie!!

I'm very stressed. I think I need a sankaty grumpkin after the epic pick.

by cuffnutt August 3, 2007

thumpy grumpkin

When you recieve a blumpkin from your grandma while your rabbit eats a carrot

I got the best thumpy grumpkin of my life from grandma Bernie

by Smittywerbenyagerbenjenson April 26, 2008

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

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!

by Joe Davis September 11, 2003