Top Definition
The sensation of two midgets simultaneously biting the inside of your ass.
"Oh my god, Britney, I just fucked Jake last night. It Felt Like Grumbo."
by Shoes Hee January 22, 2009
to take a poop,the act of deficating
after all the coffee i drank i had to take a mad grumbo
by ameecia May 26, 2005
they were playing music and you couldn't swear so we say mutha grumbo also known as mutha fucka so i guess the definition would be FUCKER
get up off yo ass mutha grumbo
by meelo grumbo April 04, 2009
something that's really fucking gross or abnormal.
Dude, look at this picture; look how grumbo those tits are lol
by watdafak April 22, 2016
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