The lava like substance that is found in the Grumble Volcano level of Mario Kart Wii. Can also be used to mean anything that would be undesirable to fall into.
When the green shell knocked me off the race track, i fell right into the Grumble.
by jonyd94 December 29, 2009
A noise made when displeased, also a brand of cake.
"Grumble, you ate my Grumble Cake."
by Steph March 30, 2004
The act of simultaneously pressing the left and right arrow keys on the keyboard whilst playing Bubble Trouble (on Miniclip). Usually appears to be a swift back and forth motion or sliding dance.
kid1: dude quit doing the grumble and play the game!!!
kid2: but you totally stole all my bubbles!
by fromthesaad October 10, 2010
Generally a girlfriend but then, all women "grumble". Therefore they are "grumble".
You can get high grade and low grade grumble.
Low grade grumble being dirty scallies...
"Goin' out to get me some grumble tonight mate."
by craigluck August 31, 2006
Interjection. Can be used anywhere, assuming the user is a badass like me.
ROAR! Grumble grumble!!!
by Dangar the Mighty October 27, 2003
Verb; to have a quick grumble, meaning to have a quick wank.

Grumbling is often done hunched over the keyboard, or for the serious old schooler, with a grumble-mag.
My mate won't stop grumbling, his room, sheets, everything smell of Chicken and Mushroom Pot Noodle.
by dj_monged August 14, 2004
a very unattactive, usu. overweight female. Chicago slang
That fool James brought just one fine girl and 3 grumbles to the party.
by J.R. September 06, 2004
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