See that girl over there with the big booty? I'm gonna be riding the donkey tonight.
by Dolphan April 5, 2006
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A term for a woman being on her period.
"How did you get on with that new fit bird the other night, did you shag her?"

"Nah, I only got a bit of tit as she was riding the cotton wool donkey."
by gamerouche March 27, 2014
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