Top Definition
A tumbling mass of pubic hair that accumulates in a heavily used and rarely cleaned bathroom. The grundleweed may then journey to other areas of the house by catching drafts of air and rolling along the ground.
My girlfriend and I were about to get it on when a massive grundleweed rolled into the room and ruined the moment.
by Demme October 04, 2007
6 Words related to Grundleweed

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