Is オージー understood by non-Australian Japanese speakers? Is the word "" (in the meaning of "Aussie", not as in "old girl" or other meanings) understood by non-Australian Japanese speakers? Also, in English, non-Australians have a tendency to use "Aussie" as noun to mean the country, which Australians don't do. Do Japanese use "" to mean the country?

In general, answer is no. Ordinary Japanese who never lived in Australia or NZ, don't understand the word.

In Japan,most familiar word is . Many understand origin of the beef is Australia.

In other means.

OG. Office Girl. But it is not used so many today. OG Sohken. Osaka Gas company's IT and think tank subsidiary. Abbreviation of Osaka Gas Sohgo Kenkyuusyo.