For one, the “G’daaaaiii” is a very specific (and somewhat less common) form of greeting, denoting surprise. A normal g’day is not drawn out at all and can be said in basically one syllable in about half a second – think “gday mate just the diesel thanks”

Billabong is not slang, but is now a defined and accepted word.

Billy has nothing to do with making tea, a billy is a bong/waterpipe

Bloody doesnt mean “very” on its own, but is used much like “Fucking” would in the sense of emphasizing the next term. “Mate it’s bloody thrashed!”

Blowie means blowjob, not blowfly. To refer to a blowfly you just say fly.

Boatie – literally have never heard this. Can’t say it doesn’t exist as slang, but it’s definitely not australia-wide.

Chook also refers to middle-aged women, as well as hens.

And honestly there’s so many more inaccuracies but I’m bored of fixing your article.
At a guess I’d guess you’re upper-middle class and in your 50s+ living in either Bris, Syd or Melb inner suburbs.