I came across some information that might be useful:
Australians may well be the laziest nation in the world when it comes to speaking. Any words containing more than three syllables are chopped in half and an ‘O’ is added on the end. For example Afternoon becomes Arvo, Ambulance becomes Ambo and Bottle Shop becomes Bottlo. Easy, isn’t it?
Mate - Anybody at all, only commonly used by males, friends - especially when you forget their name.
Aussie - Australian - pronounced Ozzy.
Youse - Plural of you - pronounced Yooz. Only used by "bogans" (see below).
Bogan - An uneducated person; (similar to the British 'chav')
Brickie - Bricklayer
Sparkie - Electrician
Chippie - Carpenter
Bikie - Biker
Yank - An American
Kiwi - A New Zealander
Pom/Pommy - An Englishman
Geography
The bush - areas outside of major cities and towns.
The outback - the deserts of inland Australia
Bushfire - wildfire
Whoop Whoop - The middle of nowhere (eg: So I was stuck out whoop whoop...)
Places
Servo - Service Station (Gas Station in Nth America)
Bottle-O - Bottle Shop (Liquor Store)
Chemist - Pharmacy (also used), Drug Store
I'm sure you won't come across all of these, but interesting to read! Add any more you know of below! And some more reading: http://en.wikipedia.org/wiki/Australian_English_vocabulary