Well maybe if your not one of those "upity" Pommies from Pommyland you would probbly say it like Paulb said and then after that, do like Dogboy said and add "mate" or something even an "eh" or two would work.
For instance, In Australia: Whehdja get that black eye (from) mate? Dja pick on 'em Pommy Bastards at the pub again lahs noyght?