your luck is in
US /jʊər lʌk ɪz ɪn/
UK /jʊər lʌk ɪz ɪn/

1.
운이 좋다, 운이 따르다
used to say that someone is having good luck
:
•
You found a twenty-dollar bill on the street? Your luck is in!
길에서 20달러짜리 지폐를 찾았다고? 운이 좋네!
•
If you get the last piece of cake, then your luck is in.
마지막 케이크 조각을 얻으면, 운이 좋은 거야.