What? It's not derogatory. It's just shorter and in some ways better specified than 'American'. I also used the word 'American' in the same post! Just didn't feel like writing the whole thing out the second time. -_-
Some people you just can't insult.
It's impossible to insult someone who refuses to be insulted.
That's not going to make anyone happy. It's Türkiye.
USAian.
Sounds cooler too because https://dragonball.fandom.com/wiki/Saiyan
But from your clarification it seem you simply meant American without any further qualifications.