not lose (any) sleep (over someone or something)(redirected from won't lose sleep over her)
not lose (any) sleep (over someone or something)
To not worry much, excessively, or at all (about someone or something). Oh, those two argue all the time—don't lose any sleep. I hope you won't lose sleep over this issue with the printer. I'll call IT in the morning and see if they can fix it.
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.