cotton wool donkey 

Slang terminology for a tampon or can be used to describe a female during menstration.

Riding the cotton wool donkey - female mentrating.

cotton wool donkey by volpoid September 25, 2006

Riding the Cotton wool donkey 

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."

Riding the Cotton wool donkey by gamerouche May 8, 2014