get nose out of business
get (one's) nose out of (someone's) business
To stop involving oneself in an intrusive or nosy manner into something that is not one's business or responsibility. I wish my neighbors would get their noses out of our business and just leave us alone! Liam, get your nose out of your brother's business—he can manage well enough on his own.
get one's nose out of someone's business
Fig. to stop interfering in someone else's business; to mind one's own business. Go away! Get your nose out of my business! Bob just can't seem to get his nose out of other people's business.