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To meddle in another person's private business.

To interrupt a conversation.
John told his brother not to butt in when he was talking to his girlfriend.
by Libertine September 01, 2009
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When you sat on your butt and done nothing for the weekend
Hey, what you do for the weekend? Buttins! I sat on my butt and did nothing
by MrPabloE March 09, 2019
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