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A large, long, ferocious coil-like turd. A very mean and venomous smelling bowel movement that is feared by everyone.
A brown cobra is known to rise above toilet water level.

The brown cobra is in all of us. You can run but you can NOT hide!
by BrownCobra April 16, 2009
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Rubbing your hand in poop and then slapping someone.
"I just gave that kid a brown cobra for giving me lip"
by Noobles February 01, 2009
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