How do you call someone born in the US besides "American"?

https://lemmy.eco.br/post/1286621

How do you call someone born in the US besides "American"? - Brasil

Well, everybody born in the american continent is technically “american” too, including Central and South America. Is there a specific term in english for these people?

The word I use most often aside from American is Seppo, which is derogatory rhyming slang (sep + -o, from septic tankYankYankee)
I’ve heard this in Australia but nowhere else. Is this Australian slang, or does somewhere else use it too?
NZ and UK use it too. I think I first learned it from a Brit.
We Brits generally use Yank, but Seppo is more Oz than UK. Though Aussie slang does tend to catch on on over here for some reason…
Look at all the seppos getting cranky at this one :) I just came in to post Seppo but you beat me

Frankly, I’m not seeing any negative replies or downvotes.

I’m a US citizen myself, though I live in and am also a born citizen of Norway. So being in basically a quantum superposition between being and not being a US-American, you could imagine that I’d have a bit of a specific perspective about the country, that would draw me to using words like “Seppo”.

If somebody called me a seppo, I wouldn’t be offended, I’d just think they were kind of dumb. It’s just too silly to take seriously as an insult.