Fast-food chain, the Burger King of Australia. Upon HJ's opening, there was a small business with the name 'Burger King'. He was offered a lot of money for the rights to the name but did not relent, and shortly after the opening of the chain he went out of business.
Hungry Jack's is the bogan version of McDonalds, much like Pepsi is to Coke.
Hello, good friend, why don't we fetch a meal from our local, friendly McDonald's?
AYE BRO, LETS GET ME A WHOPPER FROM HUNGRY JACK'S! *gang sign*