that'll do

phrase3

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, arguing or fighting

   • 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!