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.
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!
by swampchappy February 1, 2010
Get the Colonel 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.