"Rude" is a subjective term, but any time you interpret your child's language as "unfriendly", "rude", or "unkind," here's what to say to help them learn better communication.
I don't know about y'all, but I'm a positive parent with a no tolerance attitude around disrespectful language & behavior. 
It's my cue to step in and teach because I know the more I allow this behavior, the more it spreads. 
Yes, let's get your needs met, but let's do this respectfully. 
In this episode, I share my 5-step process to curbing "rude" behavior so that we can intentionally raise self-aware kids who know how to communicate their wants and needs to others in respectful ways.
Don’t forget to check out my free anger eBook - "Your 3-Step Plan When Your Child Gets Angry or Aggressive” www.themompsychologist.com/ebook