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 24, 2003
Get the riding the cotton pony mug.
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 3, 2006
Get the riding the cotton pony mug.
when a woman is on her period.
"Why is she being such a bitch today?"
"I'm not sure, maybe she's riding the cotton pony."
by Spaceman564 January 14, 2012
Get the Riding the cotton pony mug.
Menstrual cycle, period, time of month

a phase of the menstrual cycle in which the uterine lining is shed
Woman: No fun tonight

Man: Why?

Woman: Because Elmo Riding the Cotton Pony

Man: :(, I guess I just use this sock instead
by KMT83 December 11, 2011
Get the Elmo Riding the Cotton Pony mug.