English version

not bat an eye/eyelid

From Longman Dictionary of Contemporary Englishnot bat an eye/eyelidnot bat an eye/eyelidinformalSHOCK to not seem to be shocked, surprised, or embarrassed They started talking about sex, but she didn’t bat an eyelid. bat
Examples from the Corpus
not bat an eye/eyelidHe used to tell the worst lies without batting an eye.
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