I don’t know what I was doing yesterday, but I found myself in the midst of a lot of Australian words that I had never heard as a kid in those Australian tourism ads starring Paul Hogan: larrikinism, bunyip, yakka. My favorite, however, is:
shivoo. Shivooooooooo! It means a boisterous party or celebration. “Origin uncertain” according to dictionary.com. My humble opinion is that you know you’re really at a boisterous party when the noise of the party reaches a cacophony of nonsense words “Shivoooo!” and such like. Shivoo just sounds better as a word for a party than Blarghablah or Yakyak. Also, I haven’t looked them up yet but it’s possible that those are Australian words for something else.