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.

Common Names:

Name	Pronounced	Usage
Anne (1)	AHN (French), AN (English), AN-ne (Danish), AHN-ne (Finnish), AH-nə (German), AHN-nə (Dutch)	French, English, Swedish, Norwegian, Danish, Finnish, German, Dutch, Basque
Het-Heru	-	Egyptian Mythology
BradÁN	-	Ancient Irish
Nikon	-	Ancient Greek, Russian
Tucker	['tʌkə]
Kuldeep	-	Indian (Sikh)