It means the place in between the guys dick and his butt a girl rubs it
I wanna butthole grundle you.
by jacki penwell June 27, 2014
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Grundle refers to the balls chode and dick as a whole ... When abraded or abused it becomes a chafed grundle !
These pants are chafeing my grundle big time

Chafed grundle
by DoggWood November 19, 2015
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