break a leg

(idiom) good luck!

Example Sentences:

A: I have a presentation to do today!
B: Break a leg! I hope it goes well!

The actor was told to break a leg as he prepared to go on stage.

From the News:

Break a leg, say gamblers, as Mills enters dance contest

Media:

Similar idioms:

1. pull one’s leg
2. cost an arm and a leg
3. make-or-break
4. pay one’s dues
5. take a bow
6. clean break