As others point out he doesn’t quite “get away with it”. There is a long history of rude language in the Aussie parliament. I warmly recall Bob Hawke referring to “the scumbag opposite” (which was quite accurate). The Aussies just don’t seem to be as squeamish about the way people talk. It’s a lot more honest I think.
Meanwhile Wikipedia has an entertaining list of Unparliamentary language which makes it seem that Australia is not the worst offender in this regard.
