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Thin, viscous, frothy diarreah, which exits the anus in a conical spray pattern. The Black Spray is commonly the result of drinking numerous pints of Guinness and eating cheap greasy bar food and/or Taco Bell.

See also spray mud
I wouldn't go in there. I got a bad case of The Black Spray.
by AnonymousDrinker June 11, 2005
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