Perioding

Present tense of menstrual cycle known as period.

"Whats wrong with her?"

"Oh She must be perioding."

Perioding by Supposedlyworking July 2, 2009

Period Baby 

The Period Baby is similar to a Food Baby, and occurs once a month when a woman has her period and bloats to a level where it appears she is pregnant. Note: this phenomenom is usually only observable in slender women (like a snake that just ate a rat). The more heavy set women can absorb the period baby without an observable bump (like an elephant that eats a peanut).

Lindsey: "I can't go out tonight in that half-shirt."

Paris: "Why?

Lindsey: "Look at my Period Baby!!!!"

Period Baby by deepthoughts August 25, 2011

Periodic 

The feeling of craziness, confusion, or emotionally instability during a women's menstrual cycle.

My girlfriend feelings are so unpredictable; anger, sadness, and confusion are all so periodic.

Her periodic feelings are always something to run from this time of the month.

Periodic by Rena J June 16, 2016

Pig Period

A period of time lasting up to ten days till the end of the month during which cops are on their menstrual cycle. Much like the female menstruation period, cops become distastefully irritable, and pissy. Additionally, the more severe symptoms do not necessarily mirror that of a woman's cycle. These symptoms are displayed in the extremes and include, but certainly are not limited to: condescension, abrasiveness, anger, aggression, hostility, and in some cases brutality. Simply put, these expressions are a conscious means to provoke people to talk back or to stand up for themselves in a way that the po-po deem intolerable. If this method shows no promise, the victim will be wrongfully accused of something in hopes of receiving admittance. At this point, if a reasonable means to issue a ticket and/or make an arrest is still not found, the bacon will lie about the legality of a potential misdemeanor, ordinance, or felony. The phases of the PMC (Pig Menstruation Cycle) however, are opposite in the progression of stages. Symptomatic changes are most severe in the latter half of the cycle and progressively exacerbate each day. This stage is commonly referred to as PPS, or Postmenstrual Pig Syndrome and usually occurs within the last five days of the month. In essence the pig period is a time of anger and desperation. Desperation to write as many tickets or make as many arrests as needed to sufficiently satisfy their quota; which does exist despite anyone in any position telling you different.

Driver: "Dude, this pig has been riding my ass for the past 3 miles, what the fuck is his problem?"

Passenger: "Dude, the bacon are on their pig period."

Pig Period by _Yes_ September 9, 2009

Insta-Period 

When you're talking to your bro, and all of a sudden he gets hella piss and upset like girl pmsing and your bro won't STFU or Calm his tits

Nick Orlov driving and he goes Insta-Period

Insta-Period by Jack KeyChain July 6, 2014

Period Fencing

A sport originating in the eighteenth century in which two women settle a dual of pre-menstrual angst by scissoring until one party passes or taps out.

Connie: Why the hell am I so pissed whenever you're around!?
Gertrude: Why don't you pull your bottom lip over your head and swallow!
Connie: I'm going to...
Alan, interrupting: Are you two PMSing or what? You need to settle this with some period fencing.

Period Fencing by taylen24 June 16, 2010

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