(not to be confused under any circumstances with menstruating, therefore, it's spelled with an a after the m, and not an e): very offensive, for men to be incessantly quetching and complaining about this and that, and pentoute not behaving like a typical pragmatic rational male.
advice for men who hate their boss: stop manstruating about how you hate your boss and don't make enough money, read John Gray's Men are from Mars, women are from Venus, and then behave like a rational, pragmatic male by changing jobs.
by Sexydimma October 18, 2013
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This happens when a guy complains like a woman when she's having her period.
Grow some balls, clean the sand out of your vagina and don't manstruate in my house 'cause "Sewing with Nancy" was cancelled.
by Riemer August 4, 2006
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manstruate, manstruation
masculine variation on menstruate,
When a man displays behavior that is reminiscent of mood swings brought on by the female monthy cycle.
Brian has been a bitch all day; he must be manstruating.
by Peter Thomas October 12, 2005
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n. To become moody, bloated, and generally vaginal. only applicable to males.

v: -ing -ate -ated
archaic: manstrizzling
You can tell by his pissy attitude and bloody underwear that he's going through manstruation.

She went out with his best friend, so he's all manstruating and shit.
by Hanibal Sonderegger March 17, 2004
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The days when your man friend/spouse/partner/coworker etc. acts like a total intolerable douchebag when he is otherwise decent.
'Manstruation is wreaking havoc on Bob. He just told me to f*ck myself after I asked him to wipe large chunks of Pop Tart off of his expense report.'
by Fishballs December 2, 2008
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When a man bitches and moans in a truly over-dramatic fashion, similar to the effects PMS has on a woman's mood. Can be used as a noun, verb or adjective (manstruate, manstruator, manstruating, etc.) Could also mean for a man to be "stroking his ego" through anger, similar to masturbation or angry sex but without the dick involved.
"Edward is throwing a tantrum at Betty for overcooking his steak. Edward has been caught in the act of manstruation."

"You're one hell of a manstruator when you haven't had your beer"

"Better be careful! If my father catches us in the act of sexual intercourse, he'll manstruate at you for sure!"
by Chekken February 8, 2010
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