keep nose out of business
keep (one's) nose out of (someone's) business
To refrain from involving oneself in an intrusive or nosy manner with something that is someone else's business, responsibility, or private affair. I wish my neighbors would keep their noses out of our business and just leave us alone! Tom, keep your nose out of your brother's business—he can manage well enough on his own.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
keep one's nose out of someone's business
Fig. to refrain from interfering in someone else's business. (See also keep one's nose out of something.) Let John have his privacy, and keep your nose out of my business, too! Keep your nose out of my business!
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.