What does the idiom "Break a leg" mean?

• The idiom "Break a leg" means - গ) To wish someone good luck

• Break a leg
- English Meaning: used to wish good luck especially to a performer; good luck!
- Bangla Meaning: শুভকামনা জানানো।

• Ex. Sentence: Break a leg! Show them why you're the best candidate.
- Bangla Meaning: শুভকামনা রইলো! তাদের দেখিয়ে দাও তুমিই সেরা প্রার্থী।

Source:
1. Cambridge Dictionary.
2. Collins Dictionary.