May as well add a few of my own.
Toothpaste is called toothpaste, not Colgate.
A butcher will not know what adobo pork is (laughed for half an hour when my cousin asked for that and then argued with butcher).
Aussies love to give each other nicknames, some of them very uncomplimentary. This is a sign of affection, not of dislike.
Aussies like to take the piss (no, not what you may be thinking). Taking the piss is to have a joke. If an Aussie tells you something that seems very unbelieveable, pretty good chance he is taking the piss.
Aussies are not much into hockey (as suggested above), they have very little interest, although many do play. Motor racing would be up there with football type games and cricket.
The best part of here I suppose is the good ol Aussie slang.
Be ready for a lot of it.
Dog and bone = phone
Up the creek without a paddle = in trouble
dogs eye = a pie
Gotta hit the frog and toad = I have got to go home now
China plate = mate
mate = Mostly used towards another guy, but increasingly also towards women. They are not necessarily a friend.
Taking the mickey = making a joke
Thats bollocks = Thats untrue
Thats rubbish = Thats untrue
Get the f*** outa here = Thats untrue
Bloody oath =That is true
Sure as eggs are eggs = This is true
Heck yeah = This is true
Grub = food
Chuck = throw
Chuck = vomit
Chuck = Charlie (persons name)
Take the clapper for some go go juice = Take the car for some petrol
Let cat out of the bag = You just let out a secret.
Cat amongst the pigeons = That secret has got people upset.
Dunny - CR
Bog - CR
Toilet - CR
Outhouse - CR
Little boys room - CR
This is just a very small selection of typical Aussie slang tyou are likely to come across here.
To this day, 14 years on, my wife still is confused by it :-)