(n) Pronounced: Bonn-zoss-tAH-roan: An imaginary hormone that lends Australian men their superhuman attractiveness and makes them an absolute pleasure to be around. Effects seem to be amplified by beer.
Etymology: From the Australian "bonza"; meaning good, top-notch, true-blue, you-beaut-super.
Not to be confused with bozosterone; the imaginary hormone that makes really stupid people painful to be around.