1 definition by the cool breeze

Top Definition
a mixture of a grundle grab and a knuckle butt fuck. it can be quite stimulating if used correctly
the wrestler used the grumpkin technique to score a reversal.
i blew my wad as soon as that filthy slut gave me a grumpkin.
#blumpkin #grundle grab #grundle rub #dirty whores #butthole pleasure
af the cool breeze 7. september 2006
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