PMS.
Men often mistake it as a period. It is BEFORE the period. It may contain mood swings, depending on how you are. It WILL contain of cramps, headaches, etc etc. Arrogant men will often assume your pmsing if you don't want to have sex or if you get mad at them for something that is their fault. I do admit, we can be bitchy sometimes but you are exaggerating it dude.
*Watches Jason pick his nose*

Meadow: Why are you picking your nose? That's disgusting, you should get your finger out of your nose...
Jason: HOLY SHIT EVERYONE FUCKING ABORT MISSION WE HAVE FUCKING A FUCKING PMSING BITCH OVER HERE!
*Every guy runs out of the classroom in a panic while girls glare at them*
by Dontjusdgemehbruh November 20, 2014
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Not just a PRE Menstrual Syndrome, but a PRE, PRESENT or POST - all year long - Menstrual Syndrome.
In need of some chocolate, Im PMSing.
by hilanimal November 26, 2013
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(1.) The time of month when girls get all bitchy and can't make up their mind if they love you or not. They also blame everything on you!
(2.) The lamest excuse out there for bein a bitch.
(3.) The time of month where the woman also expects you to do anything for them, and anything you say to them WILL be offensive! They will also expect you to pick up THEIR messes.

Solution: STAY AWAY AND DO SOMETHING ELSE!! Either that or slap that woman across the face and tell her to grow up and quit acting like a child. Also tell them to act like a real human being !! knock some sense into them! :D
Note: Any Thumbs down I get on this definition is going to be all women, and everyone knows it!
by Steve March 16, 2005
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PMS, contrary to what many of the definitions on here state, actually stands for Partial Marine Survey. It refers to when a small group of boats survey a section of the ocean no larger then 5km. It generally takes place once a month and some mariners call it the most fun you can have in a boat.
Marine #1: Its PMS time!
Marine #2: Arrr! I love me PMS
by Seaman Staines May 30, 2007
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The time of month before a woman has her period. During this time the woman goes insane. She has bitch fits and mood swings all day.
Girl: Hey babe, wanna have sex tonight?
Guy: Yea, meet me at my place around 11
Girl: WTF! You are not getting near my pussy!
Guy: You just said...
Girl: Go suck your own dick
^^This girl has PMS
by Pimpskater June 11, 2007
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The seemingly supernatural phenomenon which occurs monthly (like the full moon), in which women are possessed by an angry spirit that seeks to make men's lives a mystery. This can refer to premenstrual stress, post menstrual stress, or just present menstrual stress.
"Better watch out, she's PMSing!"
"Wasn't her period last week though?"
"It's post menstrual stress."
by RJ:) March 20, 2010
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Short for Pointless Map Series. Original Founders : donwano, DrunkenWrestler, and Sakura_RPG
PMS 24/7 in channel Custom Maps West
by Sakura_RPG November 16, 2004
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