Lucked out

There are so many words that are pronounced differently, but what makes it interesting and challenging living in another country, is really different expression.  Everyone knows tomAtoe and tomAHtoe, but it takes a while before you understand other subtleties.  The first time I heard someone saying they "lucked out" I felt sorry, until I realized they were jubilant.  In US English, it means got lucky, and there is no "lucked in".  The web suggests this makes sense because of gambling, but it is just plain weird to me.

Merriam Webster defintion of lucked out