The incidents of irrational, emotional behavior that a male in a commited relationship subjects only their female partner to. Basically, when your boyfriend is being a little bitch for no apparent reason.
"What's wrong, baby?" - Bonquisha
"Nuthin'" - Lil' Rayray
"Everything a'ight?" - Bonquisha
"Just back the f$&# off me, woman, let me be!" - Lil' Rayray
"Damn, baby, it's coo, it's coo, I didn't know you was manstrating!" - Bonquisha
by Ælystea December 12, 2006
Get the manstrating mug.
Present progressive form of manstrate: (v) Cyclical emotional patterns to which men are at times susceptible.
Don't f*** with me, I'm manstrating right now.
by Greyson December 12, 2007
Get the manstrating mug.
A guy who is really irritable, bitchy and indecisive. Just like girls on their period. Basically, a man who is menstruating.
Before the Partwii, Lauren, the cyborg, bus surfed over to Mickey D’s with his brofriend Chuck Norris and bought a McGangbang happy meal with the funds that he jacked from his sugar momma after his disco nap that afternoon. Chuck pulled out his phone from his nuthuggers and started sexting a ginger slice with a tramp stamp that he had been friendly following ever since they shared a game of Jager pong. Lauren gave Chuck the air jerk as he noticed Tanasa the grade digger that sat next to him in his art class. Lauren gave her the “let’s just be friends” nod and grabbed his happy meal. As Lauren walked outside he saw, Bruce, the designated drunk, as he started wailing teenybopper show tunes. Bruce was manstrating again and wanted his fix of Dr. Pepper and Big league chew. The night of celebrating Lauren’s nomotion had barely even started and already he was knackered.
by Micron X February 24, 2010
Get the manstrating mug.
When a man is going through his monthlies
"You are a bitch right now - are you on your manstration?"
by Jeremy W September 12, 2005
Get the manstration mug.
when a man is in a particularly unpleasant mood, for no appearant reason.

A short tempered man
The male term for PMS, or bitchiness
Kyle: Dude just shut up already, you're annoying the hell out of me.

Sammy: Would you like me to get a tampon for that manstration?
by Ima Crazy Bitch August 15, 2009
Get the manstration mug.
The irrational periods of anger that all males will experience at least once. Usually lasts 24-48 hours.

It is believed to be due to a random influx of testosterone in the male's body. It is the driving force behind all creation, all civilization, and all invention.
_______________________________
Symptoms include, but are not limited to:
-Wanting to punch inanimate objects for no specific reason
-Pulsing headaches that can only be treated by punching things
-Voracious hunger, best remedied with large quantities of steak.
-Excessive swearing
-Excessive drinking
-Insomnia/Narcolepsy
-Agoraphobia/agoraphilia
-Photophobia/photophilia
-Periods of intense intelligence/ambition followed by periods of ignorance/lethargy
Julianus: Shit bro, I'm manstrating hard. Wanna build an empire to fuck shit up?

Romulus: Sure man, creating an empire that has a big ass legion must be the equivalent of punching dozens of inanimate objects.

Julianus: True shit. That's one of the best cures for Manstration.
by Bando-De-Shamrock May 29, 2013
Get the Manstration mug.
When a man is in a shitty mood for an extended period of time. similar to a womans pms.
1st guy: I don't know whats wrong with that guy he's been in a shitty mood all week.

2nd guy: Yeah i guess hes manstrating.
by Douchebahg January 25, 2010
Get the Manstrating mug.