When your period is due but you risk going out wearing fancy underwear. Like Russian roulette, but instead of being at the mercy of chance you are relying on your uterus.
by stickpeoplesex April 20, 2018

by riceballlover October 28, 2017

An emotion experienced by girls while they are menstruating. It is characterized by stronger-than-usual friendliness towards anyone and everyone around them. It is the opposite of PMS.
"That girl has never talked to me before, but today she really wanted to become friends."
"Oh, she probably has period friendliness."
"Oh, she probably has period friendliness."
by snaek November 2, 2009

by MrsMoggy August 28, 2009

by julierox October 2, 2007

She had her periodic table commited to memory and the elements, this night, were perfectly aligned. Nestor was gonna be a Daddy, whether he liked it or not.
by Pbaddy August 18, 2009

by The KiDBizz July 14, 2009
