@devriesj,
Hey D - cobbers and diggers are the equivalents of mates, but are getting a little archaic now (cobber is English I think, and digger is an army term).
Sneakers are usually called runners or joggers
Lollipops is more common but you rarely see them (except for Chupa-Chups)
A girlfriend can be a squeeze, better half, gelf, snail, she who must be obeyed, old lady, but in polite company we usually just say partner (no indication of marriage or not).
We don't have sidewalks, we have paths or footpaths.
We have 'the bush' which means coutnry side.
And car hoods are called bonnets (but that slowly changing). And the cars don't have trunks, they have boots.
Swimming costumes are cozzies, swimmers, trunks or budgie smugglers.
We don't have homecomings or thanksgiving but halloween is spreading like mould.
We don't have candy, we have lollies (or sweets).
You talk about the American dream in much the same way we talk about 'a fair go'.
We don't curse, we swear. A lot.