Top Definition
The dead skin scrappings collected from the grundle or taint/asshole region after a long run in the heat of summer. Swampass is the number one culprit for these God forsaken brownies.
Bill: I just went for a 10 mile run in this Louisiana Bayou death heat wave.

Mark: You better go scrap yourself clean of all the Louisiana Bayou Brownies bro.
by Csmasher May 19, 2011
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