like parent, like child; what can you expect from a child with parents like that?
A set phrase used to express that a child's bad behavior or character is no surprise given the parents' similar flaws. Often carries a critical or resigned tone.
Seeing that kid's attitude, I'd say like parent, like child.
Like parent, like child—neither of them knows any manners.
A fixed expression built from the conditional 〜なら structure, literally 'if the parent is such a parent, then the child is such a child.' The exact origin is uncertain, but it reflects a common proverbial idea.