As an Australian with Southern Euro roots, I cannot relate to 75% of these terms, but here they are:
http://www.aussieslang.com/
If you say 'em out loud, make sure to use yr best nasal twang.
There's no reference though, to some of the 'colourful' similies you may still hear in the bush if you wander in deep enough.
For example, say it's 'dry'. How dry?
It's dry as a gorilla's armpit.
It's dry as an arab's jockstrap
It's dry as a dead dingo's donger.
And most disturbing...
It's dry as a nun's cunt...