What does “get down with the kids” or “be down with the kids” mean? [duplicate]

Question

• To show how “down with the kids” she was.
• He sounds like someone’s dad trying to “get down with” the kids.

Can somebody tell me what “down with” means in these sentences?

Answer 1

Get down with the kids normally mean speaking the children's language and be less like a adult with the kids.

But it can also mean enjoying yourself without restraint with the kids, as suggested by CED:

get down

informal (mainly US) to enjoy oneself uninhibitedly, esp by dancing

(with friends in a social setting) get down and party!