1 definition by Nathan the freak

Top Definition
After having intercourse with a female who is menstruating, you then proceed to have anal intercourse. After that is finished, the female may flatulance, resulting in a fine red mist, or a "blood fart."
"Joe was doing this chick in the butt after he fucked her in the puss when she was pms'in it. So she had a blood fart!
by Nathan the freak February 18, 2007
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