When a guy is being moody and crabby and sensitive. Also: man period, man moon.
"Don't get all butthurt, guy. Are you manstruating or what?"
"No, I just need to eat. I get weird when I don't eat."
"No, I just need to eat. I get weird when I don't eat."
This is actually a real condition called IMS - Irritable Male Syndrome. Check it out! http://www.medicinenet.com/script/main/art.asp?articlekey=53725
My favorite (read: most hilarious) symptom - puffy breasts.