Banana benders = Queenslanders;
Cockroaches = New South Welshmen/women,
Gum suckers = Victorians
Apple-eaters = Taswegians
Crow-eaters = South Australians
Top Enders = N T
and
Sandgropers = West Australians
Got some from a UK paper.
They also had this bit of Oz culture:
Insults are a particular speciality of Aussie slang. "He's got a face like a half-sucked mango" is one of the few which are printable.