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1. A guy who pulls a lot of box. (see grundle)
2. The villain in My Little Pony cartoons.
by Iz Markie June 03, 2003
An expert in the area betwixt the anus and genitals that also is particularly outspoken in their art, so much so that they claim a self-declared royal authority of all things grundle-related.
Mercutio- "Bend thy back, and behold the grundleking!"
by Themistocles January 17, 2007
Synonymous with Matt Beavis. Enemy of Little Ponies, and Ruler of the Pick-up Soccer Field.
Man, the Grundle King just scored again!
by Dweebis August 07, 2008