I am an ignorant American looking to brush up on my Aussie speak. I am happy to exchange some of my own expressions that you may not find in textbooks.
I was inspired to start this thread with some of my favorite Piros quotes.
"Sticks like **** to a blanket"
"Snug as a thumb in a bum"

I have been chasing wind for 2 decades so here some that I know-
"The wind today is up and down like a whore's panties" or its just "whore's panties" for short
"Check out Kenny Shlogginz out there mowin the lawn"

I will think of more as soon as I post this.
Please add your best ones!

Sendit!!!!!!!!!

You can add in cu#t or cu#ts to bring more Aussie flavour to the saying.

"I'm as dry as a dead dingos donger" (thirsty)
"Fair suck of the sav" (fair go)
" Carrying on like a frog in a sock" (all over the place )
"Happy as a mosquito at a nudist camp" (very happy)

Stiffer than a honeymooner's d1ck. = Fairly high modulus.

Is a frog's ass watertight? (yes)
I don't like the cut of his gybe
Good from afar but far from good

Google Cockney rhyming slang for more on Seppo. I'm a "fecking yank" as y'all would say and I love where that came from.

Fair Dinkum !!!

I've been told its local to where I live.....
Which is weird coz I've heard it in every state....

Ask..."What do you know?"
Answer...."Nothing" or "Not Much"
Reply... "Can't get in trouble that way"

Far canal!