Descriptive of an otherwise MANLY man suffering a period of GIRLY behaviour when his manliness is challenged by other MANLY men... thus provoking the suspicion that he may not be very MANLY at all.
*At the gym*
"Hey AJ, why did Billy just punch the wall, throw the contents of his locker around the room, and run outta the room screaming?"
"I dunno Matty... all I said was that he was lookin' a little outta shape and should maybe work out a little harder"
"Wow!... I aint never seen Mansterics that bad before. Guess he must be on his Manstrual Cycle