The condition in which no more beer is present for consumption.
Dude, we've got a fucking beer emergency, go collect some money from people. We need to go on a beer run immediately.
n. (bEER uh-mEr-jen-Cy) nicknamed emergency for the sole purpose of stealing your friends away from home to drink an 18-pack (or any large amount of beer) in thiry minutes. Then following this you return back to your previous activity.
"Yo bro we have a beer emergency and we need you immediately."