be none of someone's business

US /bi nʌn əv ˈsʌm.wʌnz ˈbɪz.nɪs/
UK /bi nʌn əv ˈsʌm.wʌnz ˈbɪz.nɪs/
"be none of someone's business" picture
1.

〜の知ったことではない, 〜に関係ない

to not be something that someone should be involved in or know about; to not concern someone

:
What I do in my free time is none of your business.
私が自由な時間に何をするかはあなたの知ったことではない
Whether they get married or not is none of our business.
彼らが結婚するかどうかは私たちの知ったことではない