A commonly-heard alternative theory is that POM is a shortened acronym of Prisoner of His/Her Majesty (POHM) or Prisoner Of Mother England (POME). As many of Australia's first settlers were convicts, sentenced to transportation, this theory holds that upon arrival in the country they would be given a uniform with POHM emblazoned on the back, and that convicts with an extended stay on Australian soil would no longer have to wear the shirt and would often refer to newer entrants into the country as "Pohmmys". Other suggestions hold that POM is a different acronym, such as "Prisoner of Mother England" or "Port of Melbourne". These etymologies are considered by some researchers to be false, as the term "pommy" was coined long before acronyms were used in common parlance. Moreover, there is no record of prisoners in Australia ever wearing such uniforms.
Another theory is that it is rhyming slang for tommy.
The use of the word "Pom" is contentious. Some British people living in Australasia find the term offensive and demeaning, others find it harmless and amusing. Attitudes to the use of the word have varied over the years, from the 1960s when slogans such as 'bash a pom a day' were heard on New Zealand radio, to today, when the word has become so entrenched that few Australians and New Zealanders see any reason to avoid using the word, some even justifying the use of the word as being "endearing". In December 2006 the Advertising Standards Board of Australia unanimously ruled that the word "Pom" was a part of the Australian vernacular and was largely used in "playful or affectionate" terms. As a consequence, the board ruled that the word did not constitute a racial slur and could be freely used in advertising. The Board was responding to a complaint filed by a community group called British People Against Racial Discrimination.