1 definition by Skinflutelessons

Top Definition
The bunching effect that takes place when the sweat from a good workout meets the boxers in the grundle region. Also can be used as an insult.
Man I need to hit the showers I've got Grundlebundle like nobody's business.
Man that clerk always thinks im trying to steal , what a grundlebundle.
by Skinflutelessons June 21, 2007

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