The snail that comes out of the Holo-Recorder in the TV show Futurama. When the Holo-Recorder is played badly, the grumpy snail often becomes "too grumpy". Can also describe someone who is grumpy.
Fry played his song so badly, the Grumpy Snail mutated into a horrifying image.
by Zide July 7, 2009
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Passing a large usually unwilling stool that is rocky hard and very large.
Joban: I gots to go bust a grumpy before i shit my pants.

Jovan: Make sure you dont miss the bowl again.
by A little hack magic July 6, 2010
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A pet name for herpes, a venerial disease common among the lower classes within society. Used mainly by couples who dont wish to talk to much about someone's "dirty problem" and by friends who know the "secret code".
"Hey dude, you getting any action this weekend?"
"Nah man, my girl's got the grumpy lumps!"
by Brny August 7, 2006
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Everybody clears out when they hear Mr. Gutke twist a grumpy! They fear his Farticules.
by Dr Toots May 16, 2011
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Bobby Knight left the bathroom door open a sliver so he could still talk and take his morning grumpy.

- Rick Reilly
by homersimpso90210 October 9, 2009
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n. is a poop that is especially bad and stinks up the whole bathroom, it is often paired with lots of grunting and pushing.
dude, i just dropped a mean grumpy in the bathroom.
by jojoboneroo February 7, 2006
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Combination of the Grumpy Munchkin and the Blumpkin.
When a woman sits on toilet and takes a shit while a guy sits in her lap and shits into the toilet while the girl is reaching around with her mouth and giving him a blowjob.
Woman has to be on the bottom incase of horrendous taco shits.
Female flexibility is key!
Big Cat: Hey you know that really skanky waitress from that restaurant.
Little Cub: yeah. What about here?
Big Cat: Big Cat totally got the Grumpy Blumpkin from her.
Little Cub: NFK
by little cub September 24, 2009
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