i can't say i've heard anyone say nunga-nunga's, conky. though it's possible, as australia probably has more slang terms than most other countries.

also, i live in melbourne, australia's cultural home where the chicks are brunette, intelligent and drink a lot of coffee. if you go up to sydney or the gold coast you're much more likely to find the aimless blond bimbo who spends all the money she earns as a promotional model on gigantic fake cans.