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The cry of agony that accompanies a particularly painful bowel movement.
"I don't know what i ate last night, but I definitely had the brown snake moan this morning."

"I had the brown snake moan so bad I swore it was coming out sideways."
by J.Teezy November 28, 2009
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2
Brown Snake Moan- (Verb)
The moan or groan of satisfaction given after producing an especially large poop.
Jerry: "Oooo-AHHH!"
Phil, said while knocking on the bathroom door: "Damn, that was a downright Brown Snake Moan!"
by Gitche-Man March 19, 2017
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