Top Definition
The excess semen that flows out of the woman's vagina after sexual intercourse between a male and female.
After a night of of passionate sex Allie began to semenstruate as she walked into the kitchen to get a mid-night snack...she quickly grabbed a paper towel and wiped up the semen just as it ran down the inner thigh of her leg.
by gonzo words December 26, 2010

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