I was asked by an American friend to explain "Up yourself", so I think that might be australian slang. I'll give an example of the usage. "You are so up yourself." Meaning: "You are so conceited." Also, I've heard that Australians generally speak faster than the Brittish people or Americans. Oh, another one, sometimes for Brittish people, Australians use the term "Poms". 1 Brittish person is a Pom or a Pommy. 2 or more Brittish people are Poms or Pommies. (I apologise if anyone finds this offensive). Also, though this is less common (at least I think so), "Bright eyed and bushy tailed" is an australian phrase, I think. It's used when you're wide awake and alert (it's a description of a nocternal animal).