none of one's business

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
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

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
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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