The term Banana Bender was a new one on me. It is a term Australians use for a resident of Queensland.
But why call them Banana Benders?
Here in Europe where we import our bananas from the Caribbean and South America. In Australia they grow there own, and most of those bananas are grown in Queensland.
Therefore Banana Benders are Queenslanders as they are said to have the job of putting the bends in the bananas that grow there.