not bat an eye


Also found in: Dictionary, Thesaurus, Medical, Legal, Encyclopedia.

not bat an eye

also not bat an eyelid
to not show any reaction Mom didn't bat an eye when I told her I was getting married.
Usage notes: also used in the form without batting an eye with the same meaning: She can give a formal dinner for thirty without batting an eye.
See also: bat, eye, not

not bat an eye

/eyelash Informal
To show no emotion; appear unaffected: The reporter didn't bat an eyelash while reading the gruesome news.
See also: bat, eye, not