‘Australis Interruptis’ is a fun term I coined to make a point with my Australian about a speaking habit that the majority of Australians have – and seem to think nothing of.
Far from being rude (to the majority of the population), interrupting is just what Australians tend to do in conversations. I love sitting back and listening to two or more native Australians talk (especially when they’re excited) and consistently start speaking their piece before the other person is finished speaking.
And they don’t notice! It’s just the way they speak and have conversations.
Interrupting is just one more reason not to be easily offended in Australia. In fact, try honing your skills a bit and joining in. Don’t be heavy-handed about it, but there aren’t many other places that will give you quite the trial by fire in speaking up than Australia will.