a way of showing disrespect to another male. "beef" being slang for (pause) male genetalia, "rock beef" is essentially telling someone to "suck a dick" or "fuck off"
It refers to a fart by someone who is a total gas bag who farts chronically every 5 minutes. It is advised to stay at a distance from the source at a 5 mile radius. The UN has recently outlawed the use of loaded beef as a weapon in war.
When the lips,and clitoris of one's Vagina become so distended and floppy that it instantly brings to mind what one would think a Hag's
Meat funnel would look like.
"No way don't do it man,I've seen her naked.Her pussy is totally Hag Beef."
"Ugh,I was watching this porn,every chick in it was rocking some major Hag Beef."
"I'm down for some Hag Beef sandwiches."