Menstraversery 

The useless one month anniversery that women have an obsession with.

"So your one month anniversery with Jane is coming up"
"Oh shit, it is?"
"Uh.. yeah. What are you planning for the menstraversery?"

Menstraversery by BlowJay January 17, 2008

Menstriversary 

men·stri·ver·sa·ry
/mɛnstrəˈvɜrsəri/

pronunciation men-struh-vur-suh-ree
–noun

1. the monthly recurrence of the date of a past event: the 9th menstriversary of their relationship.

2. the celebration or commemoration of such a date.

Etymology:
Deriving from the Latin "mensis", meaning month, or "menstruus", meaning monthly and the Latin "vertere" meaning returning. Literally translating to: returning monthly.

Jacqueline: So, how long have you and Jillian been dating?
Justin: It's been 3 years and 8 months this past April 4th.
Jacqueline: Well, Happy 44th Menstriversary!

Menstriversary by JustinFalq April 14, 2010

menstruversary

The celebration of going another month without becoming pregnant.

Steve - "Hey Bill! Karen and I are celebrating our 5th menstruversary!"
Bill - "That's because you should never have kids, Steve, and God knows that."
Steve - "I think God knows anyone named Karen shouldn't have kids, asshole."

menstruversary by sarsinNJ November 4, 2013