Answer: breakaleg

AnswerCrossword Clue
BREAKALEG

"Good luck!"

BREAKALEG

Ironic "Good luck!"

BREAKALEG

"Knock 'em dead!"

BREAKALEG
Opening night expression (with a hidden veggie)
BREAKALEG
Expression of luck for an actor
BREAKALEGLine delivered before lines are delivered
BREAKALEGExpression of luck