bat an eyelid(redirected from didn't bat an eyelid)
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Related to didn't bat an eyelid: bat an eyelash, not bat an eyelid
bat an eyelid
To display a subtle emotional reaction, such as consternation, annoyance, sadness, joy, etc. Generally used in the negative to denote that the person in question did not display even a hint of an emotional response. Mary didn't even bat an eyelid when I told her I was moving out. That guy is dangerous. I heard he killed a man without batting an eyelid.