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none of one's business
01
used to tell someone that it is not necessary for them to know about something and that they should stop questioning about it
What is the origin of the idiom "none of one's business" and when to use it?
The idiom "none of one's business" is used to convey that a particular matter or issue is not the concern or affair of a given individual. Its origin is not rooted in a specific historical or cultural context; rather, it is a logical extension of the English language.
Example
Jim's mother reminded him that his sister's decision to change careers was entirely her choice and none of his business.
At the office, Jane avoided discussing her personal life with her colleagues, firmly asserting that it was none of their business.
When asked about her savings, Mary politely replied, "That's none of your business."
When the nosy neighbor inquired about their relationship status, Sarah told her partner, "Let's just say it's none of her business."
During a heated argument, Tom bluntly told his friend, "What I do with my free time is none of your business."
