that'll do
phrase1
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!