What is Manstruation?
1.
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.
2.
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.'
See
3.
This would be the male version of menstruation. This word can be used when a man is acting like a vagina, or a d-bag.
Keith was mad at Rick for saying something rude. To everyone else Ricks comment was not rude, but true. Keith, acting like a women over something stupid, is said to be manstruating. This happens often. Manstruation is for lamers.
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