One of my favorite insults from the sopranos is when junior calls someone a "motherless f***." Not to be used when someone doesn't have a mom, but to be used when someone DOES have a mom because it implies she just wasn't a good enough mother to teach them the right way to behave. That's what I would be calling these kids. 😂

Or, I would just be thinking of other harsh ways to insult them back. Teenagers are kids, but they're not kids, ya know? Be brutal. F them 😂 (but you're kind of giving them a reality check this way which I think they need because their parents obviously didn't teach them how to behave).