"It's none of your business" 是不关你的事的英文表达。来源不详，可能源自日常生活中的对话。例句及其中文翻译如下：

It's none of your business how much money I make.

这关你什么事。

It's none of your business who I date.

这关你什么事。

It's none of your business what I do with my free time.

这关你什么事。