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