7. Easily offended
Brits exchange jovial insults because they’re too uptight and emotionally stunted to say how they really feel, but this is not how Americans roll. Tell your U.S. pal he’s a moron, and you likely won’t get invited to his wedding. Americans are very sensitive and easily get offended.
8. American exceptionalism
Americans always think they are better than others and superior to the world. Literally, surveys and general polls unfortunately back this up.
9. Calling them “Yanks”
The ‘Y’ word won’t offend every American you meet, but never use it to address folks from the South. There, it’s likely to earn you a stern look or a full-on snarl.