that's that!

that's that!

意思是就这么定了；再没有什么可说的；让它去吧!
如：I won't agree to it and that's that!{=I won't discuss it any longer.}我不会同意那件事的,别再说了.

那就是我说的（我所指的）

就这样定了!

可不是么，那不得了~
例句：honny,i wan't you go shopping with me
oh,i'm going to watch football!
who's more important?football or me ?
you!
sure,that's that!