Top Definition
A severely raw, sore, arid, chaffed, swamped out or otherwise uncomfortable grundle area. GG can be prevented with regular taintenance and breathable undergarments.
"This heat is really making my GG flare up."

"To prepare for the possibility of a sudden Grumpy Grundle outbreak, hospitals have recently stocked up on wipes, hand fans, baby powder, and trimming scissors."
by Killah Tahm March 10, 2010

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