Butt out, Neil! This is none of your business.

不许插手，尼尔！这不关你的事。

《牛津词典》

And in that case you should butt out.

如果是那样的话，你应该置身事外。

youdao

I want everyone to butt out of my life.

我希望所有的人都不要再干涉我的生活。

youdao

Politicians should butt out and let the "competition" play out in the pools, tracks and playing fields.

CNN: Why NOT make Olympic uniforms in China?

In her aftermath comes a newly urgent debate over how to fix the reeling disaster-insurance business and whether government should step in--or butt out.

FORBES: Magazine Article

Yet many risks remain, starting with the fact that though the U.S. said it was going to butt out of Honduran affairs, old habits die hard.

WSJ: O'Grady: Hillary's Honduran Exit Strategy