not lose any sleep over something

not lose any sleep over something

COMMON If you say that you don't lose any sleep over something, you mean that you do not worry about it at all. I get criticized from time to time but I don't lose any sleep over it. The world No.8 insists she is not losing any sleep over the lack of a major trophy from her cupboard.
See also: any, lose, not, over, sleep, something

not lose any sleep over somebody/something

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lose no sleep over somebody/something

(informal) not worry a lot about somebody/something: The business does have problems at present but it’s nothing I’m going to lose any sleep over.