Definition
An expression used to convey wishes of success to someone before a test or a challenging undertaking.
祝你好運
Best of luck with your final exams!
祝你的期末考試一切順利！
Best of luck on your interview tomorrow!
祝你明天的面試順利！
I heard you're planning to start a business, best of luck to you!
我聽說你打算創業，祝你好運！