Grumplin 

A person who is small, mousy, impish, and greasy in demeanor. A grumplin is typically intensely repulsive for a non-apparent reason. Common actions of a grumplin include sniveling and cackling.

Sophie: Who's that little greasy girl sniveling in the corner? I couldn't explain it, but her impishness just repulses me!

John: I'm not sure...but she's quite a grumplin.

Grumplin by splusj November 17, 2009

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.

grossie grumpkins by Betty Wagaman October 15, 2006

Grumping it

When you skip a tutorial in a video game, and get stuck or lost in something the tutorial taught. A reference to Arin (Egoraptor) of the youtube channel Game Grumps, who would always skip tutorials.

"Bro, you're grumping it! You shouldn't have skipped the tutorial."
"Ah, yeah, I grumped it."

Grumping it by queephlosion December 16, 2020

Grumping 

When a person grind/dry humps a person alive or dead

"Did you see tom and tracy grumping at jimmys party last night?" " dude I totally practiced grumping on my pillow last night."

Grumping by Og_grumper_69 August 1, 2017

Grumblin' Sealion 

Screwing a fat woman with facial whiskers from behind and making her squeal like a sealion.

Jake won $50 after a Grumblin' Sealion experimentation.

Grumblin' Sealion by Squeakles December 3, 2011

Grumping 

The act of making an exaggerated frown in the shape of an upside down "U." Often used when someone is being ridiculed in a joking situation.

While grumping be sure to make your frown as curvy and unpleasant as possible

Grumping by mmoneh November 18, 2011

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.

Sankaty Grumpkin by cuffnutt August 3, 2007