Break a leg.
[Slang] BREAK A LEG. - Learn How to Wish Someone Luck in a Unique Way
Good luck.
Break a leg" is a classic saying used to wish performers good luck before they go on stage, based on the superstition that saying the opposite of what you mean will bring good luck.
Example Sentences
Break a leg in your interview tomorrow!
Good luck with your interview tomorrow!
I'm performing tonight, wish me luck! Break a leg!
I'm performing tonight, wish me good luck!
As she was about to go on stage, her friends cheered, "Go break a leg!"
As she was about to perform, her friends wished her good luck.