Stump.

Get a stump, nails, and a hammer. Everyone takes a nail and hammers it just enough to start it in front of them, and one more social nail in the middle. Then the person who starts takes the hammer and throws it up so it does one end over end rotation (at least) and then catches it and all in one motion, tries to hit another player's nail.

If you hit it, that's a sip. If you hammer it all the way in, that's a full beer. You keep hammering til you miss then pass to the next person.

It is a very, very stupidly dangerous (but awesome) drinking game.