Meaning of ‘Butt in’ Phrasal Verb in English

Stop butting in and let them finish their argument.

Please don't butt in while I'm on the phone with a client.

She always butts in when we're trying to have a private discussion.

He tends to butt in on family matters even when they don't concern him.

I wish he wouldn't butt in with his opinions when we're talking about work.

I wanted to share my idea, but I didn't want to butt in on their conversation.