The origin of the idiom "make a killing" is uncertain, but it is believed to have originated in the United States in the early 20th century. It is used to describe the act of making a large or excessive amount of money, especially in a short period or from a specific venture, investment, or opportunity.

What is the origin of the idiom "make a killing" and when to use it?

英語での「 make a killing」の定義と意味

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