menstrous 

(adj.) having the ugly or frightening behaviour often attributed to "monsters" manifested by women when experiencing PMS.

The extrinsic-origin of the word is to be found in Slavic languages where "monstrum" stands for "monster", and so a noun of this word (a lady in PMS) would therefore be a "menstrum".

Selena threw her menstrous look at him and in it he could see all the fearful wretchedness of a wild animal captured.

menstrous by T-Error November 28, 2016

Mastrous 

The Spartan word for Epic/Amazing.

Can be abbreviated: Mastro, Mastrousness, etc.

"That game is Mastro"

"OMFG IM SO MASTROUS!"

"This movie is full of MASTROUSNESS!"

Mastrous by FetusxLauncher October 8, 2007

Menstrual mouth 

Performing oral sex on a girl who is having her period menstruating.

A guy and a gal kiss after he performs oral sex on her during her period.
After they kiss, the gal says, " Go brush your teeth, your have menstrual mouth"

Menstrual mouth by olive man November 22, 2014

menstrual high-five 

Usually initiated by the guy, an act and symbol of relief that one's lady friend is menstruating and thus, not pregnant. For example, if your girlfriend is on an oral contraceptive and you decide to pull the goalie for the season, one may start to worry that the pill may not be 100% effective. In this instance, one is excited when that time of the month comes and upon hearing of Aunt Flow's visit, a menstrual high-five is warranted.

Guy: hey babe, this party blows. Wanna sneak into the laundry room and fuck on their dryer?

Girl: I can't. I got my period this morning...

Guy: Whew! Menstrual high-five!!!

*puts up arm with a Todd-from-Scrubs-like grin*

menstrual high-five by hardcore Rx June 1, 2011

MenstrualMan 

A Superhero with an used tampon as a backpack. A Great Man who tries to heal bleeding-hate wherever he comes across it!!!

My missus has just kicked the shit out of me for no reason . MenstrualMan where are you!!!???

MenstrualMan by SirGreg February 19, 2017

Neverending menstruation syndrome 

When a woman is always like having she's menstruation, getting easily upset, overacting and making big deal of random stupid things.

It's a softer kind of the raging bitch disorder with attention whore features.

-Mary is acting weird and furious these days, she must be having a raging bitch disorder.

-No buddy, not only these days, she definitely has a Neverending menstruation syndrome.

Neverending menstruation syndrome by Rodkor July 10, 2012

Menstrosity 

Noun.
A girl who is PMSing and/or being a total bitch. Whining, complaining, and crazy emotional outburts are all traits of a menstrosity

Babe: Did you hear Jillian screaming and ranting about how unfair life is?

Greg: Yeah, she was being a total menstrosity.

Menstrosity by Bambino624 December 16, 2008