bat an eye

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 eye when I told her I was moving out. That guy is dangerous. I heard he killed a man without batting an eye.

not bat an eye/eyelash/eyelid

to not show any shock or surprise 'So what did she say when you told her you were leaving?' 'She didn't bat an eyelid.'

Common Names:

Name	Pronounced	Usage
Kia	KEE-ah	Swedish
Che	CHE	Spanish
Colm	-	Irish
Temperance	TEM-prənts, TEM-pər-ənts	English (Archaic)
Hephzibah	HEF-zi-bə (English), HEP-zi-bə (English)	Biblical
Emperatriz	em-pe-rah-TREETH (Spanish), em-pe-rah-TREES (Latin American Spanish)	Spanish