I've spent ages enjoying this thread....we have loads of different ways to describe stuff in Australia and as my fellow Aussies have said, they vary from state to state.
Here's a few:
We have biscuits not cookies, scones not biscuits, we wear thongs on our feet not flip flops and g-strings further up...not thongs and we have bums not butts.
My husband came to Australia from Sicily when he was a young adult...he finds English maddening, difficult and often mangles the language. He has us in fits with some of his sayings...some of his best ones are "It's raining cats and pigs" or "Do you think I came down with the last sheep?" and constantly confuses the word kitchen with chicken.