that'll do

that'll do

1. Used to acknowledge something as being sufficient.

   Just one six-pack of beer left, eh? Well, that'll do for this weekend.

2. Used to stop somebody talking or an argument; synonym of fair enough.

   OK, all right now — settle down — that'll do.

3. A standard command to a herding dog to desist and return to the handler.

   All right now, that'll do, lass, that'll do!