In the last 24 hours, Tony Abbott wished good luck to "Mike", Australia's captain in the Soccer World Cup, the world's biggest sporting event outside the Olympics. The captain's name is actually Mile (pronounced Millay) Jedinak.
http://www.smh.com.au/fifa-world-cup...614-zs7q2.html
And when he was presented with a ten-gallon hat in Texas, he responded with "Yee-HOW!" As he had decided this joke was appropriate, I suggest he could at least have used the correct expression ("Yee-HA!" or "Yee-HAW!")