Although she considers herself a straight-shooter, my aunt’s blunt tone often comes across as rude and discourteous.

Constantly yelling and screaming, my discourteous neighbor is obnoxiously rude.

The representative was discourteous and lost the sale by asking rude questions.

Complaining about the discourteous waiter, the diners asked the manger to do something about his impolite staff member.

My boss is often discourteous and speaks to me in a disrespectful tone.