Aussies are trying to insist that "the shoey" is rather new and not actually a tradition of theirs. I say, hogwash. IT'S A RUGBY TRADITION!!! We all know rugby is big down there too, so its plausible that it's a thing down there. Ruggers call it "Shooting the Boot" and it is not always just beer in the shoe, grass, spit and other things make their way in there too. "Shooting the Boot" is meant as a punishment, so when you go to a rugby party and mess up a song or something, be prepared to 'Shoot the Boot'.