Also found in: Dictionary, Legal.
(and) that's that
That is final; the issue is settled or completed. You are going to your sister's recital and that's that! No more complaining. That's that! I just send the proofs to the printer. Let's just say that's that and be done with it.
Also, that takes care of that. There's no more to be said or done; the matter is finished, the issue is settled. For example, Dad's not buying you a television set, and that's that, or We've paid all we owe, and that takes care of that. [Early 1800s]
1. People say that's that to say that something is finished or has been dealt with. Once all my hair had gone I could just say `Well, it's happened and that's that.' `Well that's that, then,' he said with relief. `Now I can go.'
2. People say that's that to show that they will not accept any arguments. We're going out and that's that.