Where the victim gets grabbed by the gooch and is tipped forward while you pull their genitalia in an upwards motion (like a chainsaw).
Man, Ree Ree just did the grundle grab on me again! That's the fifth one this lunch time.
by Deedoid February 3, 2017
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When someone reaches over to grab the spot between your ass and balls
When I was walking back to my seat, this lady grundle grabbed me.
by The_Urban_Dick August 10, 2016
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