Top Definition
A euphemism for a mixture of constipation and pre-lining of your underware with shit stains, usually associated with high temperatures.

Derives from the Prince song "Black Sweat" from his 3121 album.
"I've been driving so long in this heat I'm working up a brown sweat"
by doughnut2128 May 26, 2009
Sweating as a result of needing to poo. Generally occurs in stressful situations.
Where is the closest toilet? I've broken out into brown sweats.
by nahnahbobo March 05, 2016
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