A mildly derogatory term used by Australians and Kiwi
s to refer to the English people. The term originates from the abbreviation "PoHM", which stood for "Prisoner of Her Majesty" and was used to describe the convicts shipped from Britain and Ireland to Australia in the 18th and 19th centuries. The term was turned on its head, and is used in reference to the fact that the English are still, in the 21st century, stuck in Britain, while the Australians are now free from the British Government, living in independent Australia.
It's pronounced like "pom".