not someone's concern
idiom
variants
or none of someone's concern
or no concern of someone's
: not something one is responsible for or involved in
Her affairs are not my concern.
That's no concern of yours.
Cite this Entry
“Not someone's concern.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/not%20someone%27s%20concern. Accessed 30 Oct. 2025.
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