manstruating 

Like a female period (or menstuating) but when it occurs in a man, and he becomes bitchy, annoying and changes his mood every 20 seconds

Lewis went off in another strop, he's completely manstruating

manstruating by Jackie Bennet February 5, 2009

manstruating 

anytime a man is acting like a girl i.e emotional, irrational, etc.. its is said that they are manstruating

dude did you see dan?!! he was watching the notebook and started crying, he must be manstruating.

manstruating by nicas4life July 6, 2008

Manstruating 

When a man is "on the rag."

"I think Chad must be manstruating again. He was being a real dick last night.

Manstruating by Hophead June 21, 2008

manstruating 

A monthly three to five day period when a man seems particularly moody, weak, emotional or indecisive.

Dude 1: "Hey, have you talked to Jeremy lately? He started to cry when I told him he had a flat."

Dude 2: "Oh, leave Jeremy alone. He's manstruating. He'll be better in a couple of days."

manstruating by Robert the Great February 4, 2013

Manstruating 

A man who is in the act of being grumpy moody.

Hey guys, sorry I am a little down today. I'm manstruating.

Manstruating by Scordinosaur February 19, 2010

Manstruating 

When a male is in a mood considered grumpy or lonely.

Usually occurs once a month.
Manstruation is very bothersome to all of this particular male's friends.

a.k.a. Man Period

Dude, he is in such a funk.

Yeah, he's manstruating.

Manstruating by DrCakeMan64 January 28, 2014

manstruating 

The male version of the menstrual cycle.
A man period.
The male version of PMS.

I'm cranky. I must be manstruating.

manstruating by Lancelot1 August 12, 2006