butt out

Modelled after butt in.

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butt out (third-person singular simple present butts out, present participle butting out, simple past and past participle butted out)

1. (intransitive, Canada, US, slang, derogatory) To stop interfering; mind one's own business.
2. (idiomatic, imperative) To tell someone rudely to leave them alone or not get involved in what they're doing.

   The government should butt out of people's private lives.

• outbutt