Sounds like a term created by those people who get weirdly upset at Americans being called Americans because "America is 2 continents so technically everyone from North and South America is American"
Yea, because it is weird, you dolt. It’s literally just because it’s easier to say that it stuck, but it’s flatly useless. The country’s name is stupid, hard to deal with, and pretty much only the reality on the surface…much like the country itself.
I just say “US citizens”. It would probably be more accurate to say “citizens of the USA” buy my fucking god they aren’t worth that kind of effort.