From pom + -ie (“diminutive suffix”). Australian from 1912.
Meanings
(Australia, New-Zealand, South-Africa, colloquial, pejorative, sometimes) An English immigrant; a pom.
“It′ll be a long time before I do that,” the pilot said grimly. “She′s my Queen as well as yours, you know. I′m not a bloody Pommie.”[…]“Too right, it′s difficult,” the Australian said. And then he added, “All Pommies aren′t bloody. I used that as a kind of figure of speech.” 1953, Nevil Shute, In the Wet, published 2010, unnumbered page:
A Pommie. They were sending him to England to work with a Pommie. After all that he had done for this country they were shipping him off to a cold, rain-infested, windy little isle to work a case with a Pommie. 2005, Craig Zerf, Plob, page 234:
There are a lot of Pommies in Australia; travelling round, looking for work, and Dad reckoned you could pay them peanuts.[…]If Sissy couldn′t go back to school, I thought she should help out more, then we wouldn′t have to hire a Pommie house girl. 2011, Ali Lewis, Everybody Jam, unnumbered page: