Swearing
"It is generally accepted that 'cunt' is the most tabooed word in the English Language" (David Crystal)
“Australians swear more than any other English speaking population” (Roland Sussex)
"'Bloody' has now become an important indicator of Australianness and of cultural values such as friendliness, informality, laid-backness, mateship - and perhaps even the Australian dislike and distrust of verbal and intellectual graces" (Kate Burridge)