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1.
Similar to the "O face", "Brown Face" is the uncontrolled spasming of the facial muscles due to an especially pleasant defecation. Also known as the "B face".
All that fiber made a sweet turd. I'm sure my brown face was epic as I defecated. But it was quite an experience to follow B face with ring sting.
by Superhonky January 06, 2010
 
2.
Smearing the diarrhea of a dolphin on your face and genitals in order to inveigle your racial features.
Max went out in brownface in order to pick up chicks.
by captain foolcool July 10, 2008