grumboy 

When your boy is trying to be daddy but is just too cute atm

Dylan is such a grumboy he almost didn't turn me on

grumboy by thesquipdude January 19, 2018

grumbot 

Grumbot was a robot made to serve mumbo and grian, his two dads, in the great hermatian mayoral race. Grumbot failed but now resides in a small box next to the shoping District.

Grumbot did well in that race.

grumbot by Randomzan14 August 5, 2020

Mumbly Grumbly 

Term used to describe someone who complains, bitches and moans all the time but does it in a low 'mumbled' voice, and in low, run-on sentences so you can't understand what they are saying.
Usually, but not always, limited to grumpy old men.

That old dude looks mad, and keeps mumbling something, but I can't understand him.
Yeah that's old man Withers...he's always all Mumbly Grumbly.

Mumbly Grumbly by phoenixxx70 May 14, 2010

Big Grumby 

Taking a giant satisfying crap.

After Big Bob ate all you could eat tacos at the local bar, his stomach began to gurgle and decided he'd better take a Big Grumby

Big Grumby by Cramerica Industries January 5, 2007

Jonas Grumby, The "Skipper" 

Jonas Grumby The "Skipper" from Gilligan's Island. Few people know what the Skippers name was. Played by Alan Hale, Jr. from 1964 to 1967 one of the "seven stranded castaways" from the ill-fated S.S. Minnow
stranded on an uncharted island on the Pacific following a storm.

Gilligan: "Skipper"
Skipper: "Yea little buddy"
Gilligan: "The radio said Jonas Grumby sank the Minnow, that's you"
Skipper: "Yes I know thats me Jonas Grumby, The "Skipper".

Jonas Grumby, The "Skipper" by Farsidefan February 14, 2009

Grumbox 

A noun referring to someone who is angry because of the BP Oil Spill.

My grandpa is a grumbox.

Grumbox by Amelia J. December 14, 2010

Grumbo 

A deformed creature who lives with a Jewish family in the 1940s. His family ends up getting captured by Gestapo, and is left all by himself in an attic.

Have you seen Grumbo lately? I heard that he's still hiding in the attic.

Grumbo by Zephyr321 April 14, 2019