none of (one's) business

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none of (one's) business

Something that is of no concern to another. It's really none of his business what I do with the money I earn.
See also: business, none, of

none of someone's business

not of someone's concern. (A gentle rebuke.) Q: When are you going to leave for home? A: None of your business. How I managed to afford all this is none of your business.
See also: business, none, of

(It's) none of your business!

It is nothing that you need to know. It is none of your concern. (Not very polite.) Alice: How much does a little diamond like that cost? Mary: None of your business! John: Do you want to go out with me Friday night? Mary: Sorry, I don't think so. John: Well, what are you doing then? Mary: None of your business!
See also: none, of

none of one's business

Not one's concern, as in How much I earn is none of your business. This expression employs business in the sense of "one's affairs," a usage dating from about 1600. (Also see mind one's own business.) A slangy, jocular variant from about 1930 is none of one's beeswax. The related verb phrase have no business is used to indicate that one should not meddle or interfere, as in He has no business discussing the will with outsiders.
See also: business, none, of
References in classic literature ?
He cast down his eyes and hurried out as if it were none of his business, careful as he went not to inflict any accidental injury on the young lady.
Mr Clare volunteered to do so, though it was none of his business, asking Tess to accompany him.
The tyranny of a chief over a subject was none of his business.
But skipper Sam Torrance refused to limit his European Ryder Cup stars' social lives in 2002, saying it was none of his business what they did at the end of a day's play.
She also cursed him and said it was none of his business," a court source said.
Though he may subconsciously see your sexuality as a threat, who you sleep with is really none of his business.
Although it was none of his business, I explained that Friday was music day, which meant the older girls had to drive to two different communities for piano lessons and choir practice, and the younger ones had a reduced workload.
In the first case, it's none of his business how any woman dresses.
Patricia McQueeney added: "He says it is none of his business whether a child saw the film - as he is not the mother or father.