"What are you like?" is a definite Austraaalianism.

You sure 'bout dat? I've heard it used in Britland by Britspeakers and I thought I'd heard it on BritTV too....No, that doesn't necessarily mean it's not Antipodean in origin, but I have to say, I ain't never heard an Aussie use it, but I've heard it on the lips of Brits many a time.