Top Definition
Grunny (NOUN) - A fictional animal on GaiaOnline.com. Name is a combination of "Green" and "bunny" which describes the grunny's appearence. Grunnies carry a poison that, when injected into humans through a bite, can make them into Grunny Zombies (Grombies)
Member1: OMFG there's a grunny on your head O_O
by Nanaki001 November 09, 2006

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Photos & Videos
A green zombie rabbit that was injected with the G virus. If you get infected by many of them, one will sprout up out of your head (from gaiaonline.com)
All hail Lord Grunny and his green rabbity-ness
by D. Marie August 07, 2006

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A tiger like animal in the form of a Green bunny, with a virus that will infect you in seconds. Since it is a Green bunny, they have named this rare species a Grunny, or in the Alt universe,
A prunny. Also, they have discovered rare sightings of Gramsters, and many have been infected and have turned into 'Grombies'.
A: Dude, what's that moving in the bush?
B: Some kind of rabbit...
A: Wait a minute... It's a Grunny with a Prunny and a Gramster!
A and B: RUN BEFORE IT INFECTS US!!!!!
by TrunnyGrunny April 22, 2011

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Actor Greg Grunberg's (of Heroes and Alias fame) nickname.
Grunny plays Matt Parkman, the telepathic cop, on Heroes.
by claramata June 12, 2009

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something that is equally gross and funny.
person 1 : did you see when that guy made milk come out of his nose when he couldn't stop laughing?

person 2 : hells yes! that was mad grunny!
by alexa is BOMB November 11, 2007

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crap or shit
youre a grunny ball
by owen November 18, 2003

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A slothlike creature, often found in front of a computer.
Grunny likes to IM.
by I'll never tell February 29, 2004

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