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

When you tell them to get their butt out, you get folk's attention.

NPR: New Orleans Family Heads North

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?

The tobacco control industry should butt out and take its authoritarian agenda elsewhere.

BBC: Smoking in films 'encourages teenagers to take it up'