Moomba

[snopes]

It has been an urban legend for years: that Moomba, officially known as an Aboriginal word meaning "let's get together and have fun", actually means "up your bum". Turns out it might be true.

Linguists and historians say Moomba is a joining of the Aboriginal words "moom", meaning bottom, and "ba" , which alternatively means "up" or indicates a joke — in this case, a joke played on the burghers of Melbourne in 1955 when they searched for a name for their celebration of civic pride.

http://www.theage.com.au/news/nation...780065992.html

There is also a legend about the name of our capital, Canberra. The official translation of the Aboriginal word is “meeting place” – but the rumour persists that it actually means something akin to “toilet.”
Leaving aside the obvious conclusion, that either translation works for a city of politicians and bureaucrats, I suspect this and the Moomba legend may be a manifestation of the time-honoured Australian iconoclastic tradition.