Hello Hyla, I don't think I've ever replied to one of your posts before!!

I'm wondering if there are other such phrases people use around the world that convey such things, or that we don't understand - examples for me include "Down Under"

What's to not understand? We're down under... (unless you believe the SatireWire article where we barged our way into the northern hemisphere) http://makeashorterlink.com/?A2BE32E7

The term "Down Under" probably became known worldwide from the 'Men at Work' song http://www2.tpg.com.au/users/vegemite/menatwork.html which became famous the second time around when Australia won the America's Cup yee hah! all those years ago. I'm not sure how it really started though... Might need some help from those other fine Aussies - although every Aussie Slang dictionary I've consulted tells me I have to include the Zilders in this too.

Hev