If you're bumming out, you're not gonna get to the top, so as long as we're up here we might as well make a point of grooving. (Quoting Scott Fischer)
Australianism' means single-minded determination to win - to win within the laws but, if necessary, to the last limit within them. It means where the 'impossible' is within the realm of what the human body can do, there are Australians who believe that they can do it - and who have succeeded often enough to make us wonder if anything is impossible to them. It means they have never lost a match - particularly a Test match - until the last run is scored or their last wicket down.