Como dizer: Arrogante

Para dizer que alguém é arrogante, usamos arrogant (adj. formal) ou big-headed (adj. informal).  

If you are arrogant/big-headed, you are too confident and your behaviour annoys people. Arrogant people often think they are better than other people.

Examples:

Do you know any arrogant people?

Would I be big-headed if I said I was the best teacher in the school?

Thanks for reading it!