A fork of Rural Dictionary
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."
The description of a woman and her negative mood when she is in the midst of her menstrual cycle (i.e. riding the "cotton" tampon).
Boy, Sally is really a Colonel Cotton Pony today!
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