"Back blocks" generally means a region outside of the cities and "civilised" areas. It can mean "the bush", or the country. If someone comes from the "back blocks" it may mean they come from a bush or outback town.
"Back blocks" can also have a derogatory meaning: if someone lives in the "black blocks", they may live in the poorer suburbs where facilities are less desirable.
''Dill'' means ''idiot'' as australian slang.
Grog is a slang term for alcohol.
G'dayThere is no specific Australian slang word for 'welcome'. G'day is a greeting, but does not mean 'welcome'.
Canberra is the capital city of Australia.. not a slang word.
Tomato sauce
It is a slang word for defecating.
"Oval" means the same thing in Australia as it does in America, an elongated circle. I think what you think it means is the answer to this question, "What does 'Date' mean in Australian slang?"
"Carn" is Australian slang for come on.
Australian slang, to be drinking alone.
A long time.
husband , in Australian slang And in American slang too.
To have a "gander" means to have a look or to examine.