Here are some slang:
Ta = thank you
gimme a tic - give me a sec
bugger off = go away
cool bananas = cool or thanks but sometimes this can be thanks monkey. Depends how they say it in a sentence. I heard this mostly when they are infront of Chinese.
boogie = kulangot
cheeky = wais ka or clever. Depends on how they used it.
aggro = aggressive
bs = bullshit
one of their fave expression "bloody" = very
chook = chicken
chips = fries
dipstick = idiot
fruit loop = fool
Gabba = Wooloongabba (the Brisbane cricket ground)
heaps = a lot
kindie = kindergarten
lippy = lipstick
Maccas = (pron. "mackers") : McDonald's (the hamburger place)
Pig's arse! = I don't agree with you
Rego = vehicle registration
Rubbish = garbage or to criticize. e.g. What he said was rubbish! = what he said was nonsense.
Servo = petrol station
Tucker-bag = food bag
Uni = university
Vedgies = vegetables
whereabouts = where. Whereabouts do you live? whereabout did you go this weekend.
White pointers = topless (female) sunbathers
Yabber = talk (a lot)
If you want to know a lot of slang and speak like local talk to them and you will learnt heaps.