what of it?
01
だから何?, 何が問題なの?
used to convey indifference, defiance, or dismissal towards something that has been said or proposed
例
What of it? It's not like I missed anything important by skipping class.
だから何? 授業をサボって重要なことを見逃したわけじゃない。
だから何?, 何が問題なの?