Well, we refer to the English (and I mean that specifically, not the British) as Poms, though I'm unsure of where the name came from originally. Those terms aren't ones I have come across before, but would have referred to speaking with a more English accent, and therefore being a bit "posh". All the radio announcers used to cultivate very English sounding tones in the past, but nobody bothers now. Possibly a pommiefied Aussie was blending in so well in England that he or she had lost the Australian outlook on life.
A ten pound Pom was one who migrated to Australia when there was a drive to boost the population, and so an individual could come for that amount of money.
In a way I was probably an "Aussie Pom" as my parents were both English, and although I was born in Australia, I didn't speak with an Australian accent, but more like my mother.
These days we have migrants from all over the world and so nobody notices anybody's accent!
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