The scots and the irish can sometimes have really difficult accents to understand especially glaswegians. I was in NZ with a couple of fellas from glasgow and i really struggled to understand their accents. That said in certain parts of england the accents can be really difficult to understand and many europeans i have met have told me that i speak really fast and they find me difficult to understand even though i think i speak quite well. But then i suppose you dont appreciate what you may sound like to other people especially when you're around people with similar accents.
Another aussies phrase i like is 'no dramas' meaning the same as no worries, when i firast heard it i thought the person was taking the piss and that i had come across abrupt but soon realised it was just colloquial.
Some Queensland colloquialisms that I reckon are a bit of alrighter:
I am feeling "dusty" = I have a hangover
I am feeling "ordinary" = I have a hangover
I will be "sucking piss" tonight = I will be consuming alcoholic beverages tonight
I am on the "wee wee" tonight = I will be consuming alcoholic beverages tonight
I am "smashing the piss" tonight = (you can probably work this out by now)
She is "trouting" = she is vomitting
She is "tidy" = she is attractive
He is a "yahoo" = he is someone who typically behaves in an unsociable manner (also a verb - "yahooing")
He is a "bevan" = he is someone who spends his entire paycheque on his car and lets his kids eat vegemite sandwiches for dinner.
She is a "bev-chick" = ie: the female counterpart of the aformentioned
What a "bogan"= What a disadvantaged socioeconomic situation that individual is in
"Oi!" = pardon me, I need your attention
I know that there will be people who will get on now and say that they have never heard of these terms, but they will likely be "mexians" (ie: from south of the NSW border)