The phrase "butt out" is an informal way of telling someone to stop interfering with a situation or conversation. It is often considered rude or impolite. There are several synonyms for "butt out" that can be used in a more polite or professional setting. For example, "mind your own business," "stay out of it," "let it be," or "back off." These phrases convey the same message as "butt out" but are less confrontational. It is important to remember that respecting others' boundaries and privacy is crucial in any setting. Using a synonym for "butt out" in a respectful manner can be a useful communication tool for avoiding conflict or confrontation.