You don't call someone, you "ring them up." If you "love up" an old house if you are renovating it. You are "knackered" if you are tired and if you want some candy ask for some "lollies."
Some of the differences result from the Australian tendency to shorten words or to economize. Aussie rules football is "footy." A pickup truck is a "utility" or a "ute." A camping trailer is a "caravan" or simply a "van."
There are subtle differences in road signs as well. A passing lane is an "overtaking lane." A yield sign is a "give way" sign.
Instead of "deer crossing" signs you see signs tuned to the local, nocturnal marsupials. And since they are nocturnal, the likelyhood of squashing one on the road is alarmingly high.