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.

/eyelash Informal

To show no emotion; appear unaffected: The reporter didn't bat an eyelash while reading the gruesome news.

Name	Pronounced	Usage
Cesc	SESK	Catalan
Sokratis	-	Greek
Maija	MIE-yah	Finnish
Gamil	-	Arabic (Egyptian)
Nadica	-	Croatian, Serbian
Rinaldo	-	Italian