Periodarian 

An astonishingly cunty bitch, suspected to be on their period, taking constant offense and devouring any innocent victims that attempts to engage.

Sorry bro, I gotta hop off warzone. My girl’s being a real periodarian and won’t stop bitching at me.

Periodarian by 2muskaqueers September 7, 2020

Periodbrain 

When bitches be going crazy due to their menstrual cycle. Periodbrain may cause: irrational thoughts, spontaneous crying, extreme anger, random freak-outs, freak-outs over boys, the creation of unrealistic scenarios and just pure bitchiness.

My Periodbrain was so bad today I couldn't stop crying or punching things.

Dude your'e acting nuts! Do you have Periodbrain again?

Periodbrain by browneyedchick September 19, 2013

Periodating 

The state of getting your period

John: Man, Jessica has been acting really bitchy today
Jake: Yeah, she must be periodating

Periodating by robasaurusrex December 29, 2010