having a period; menstruating.
better put a plastic sheet on the sofa before thunderthighs sits down, she's riding the cotton pony.
by Dunky Oggins November 23, 2003
Can you define these popular missing words?
A term used to for a female having a period. It references using a tampon (the cotton pony).
I had cramps all day because I'm riding the cotton pony.
by damedonna July 03, 2006