Ladder Immigrant
An immigrant who forgets where they came from once they get comfortable, and then starts acting like they're the boss of the whole country.
I got my citizenship, and now I'm telling everyone else what to do. 'You don't know anything!' I said, like I had a PhD in being smug.
Once I got my house, I started acting like I was the richest person in the world. 'You can't have my car!' I yelled, like I had a Lamborghini in my garage.
I got my job, and now I think I'm the best person ever. 'You're all failures!' I said, like I had a trophy for being annoying.