( NAmE , informal ) to involve yourself in a situation that does not concern you :
I'm sure she doesn't want us horning in on her business.
( NAmE , informal ) to involve yourself in a situation that does not concern you :
I'm sure she doesn't want us horning in on her business.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005