Haha! You need more Aussie friends!

Strewth Cobber- dang, friend- damn, mate
Stone the crows-Not sure the meaning, but it gets said a lot. Kind of like our 'the hell you say', or the way kids use 'no way', even in acknowledging something.
Strines- Australians
So, in short, he warned you of the Australians, with a wink, of course.
....and my friends Down Under say we talk funny!