your luck is in
US /jʊər lʌk ɪz ɪn/
UK /jʊər lʌk ɪz ɪn/
1.
used to say that someone is having good luck
:
•
You found a twenty-dollar bill on the street? Your luck is in!
•
If you get the last piece of cake, then your luck is in.
used to say that someone is having good luck