Top Definition
Assembling a large army of your cohorts to go on a sexy romp through a densely populated area, the object being to continuously grasp the grundel of the person in front of you at all times. The result is a bouncing chain of jubilant ninnywitts. Knibb High Football rules!
"Hey Todd, I'd be honored if you were behind me in today's grundel marathon!"
"Sure no problem, big guy, make sure u squeeze em hard, and until the pus comes out."
by steven bo-bevin February 16, 2008

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