be none of (one's) business

be none of (one's) business

To not be something that one needs to know or worry about; to be something private. It's really none of his business what I do with the money I earn.
See also: business, none, of
Farlex Dictionary of Idioms.

be none of somebody’s ˈbusiness

,

be no business of somebody’s

(informal) a person has no right to know something: ‘How much do you earn?’ ‘That’s none of your business.’ It’s no business of yours who I go out with.
See also: business, none, of
Farlex Partner Idioms Dictionary
See also:
  • (I) wouldn't (do something) if I were you
  • (one) could use (something)
  • a straw will show which way the wind blows
  • (one) doesn't give a rip (about something)
  • (one) doesn't give a hoot (about something)
  • a/the feel of (something)
  • all right
  • a crack at (someone or something)
  • (you) wanna make something of it?
  • a fast talker