The phrase "one's luck is in" is an informal idiomatic expression that signifies a period of good fortune or a favorable streak. The origin of this phrase is rooted in the notion that someone's luck has improved or is currently on the upswing. It is often used to describe a situation in which things are going well for an individual, typically in a casual or conversational context.

What is the origin of the idiom "one's luck is in" and when to use it?

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英語での「one's luck is in」の定義と意味

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