without (even) batting an eye

without (even) batting an eye

Without having or displaying any sort of emotional response, especially to that which would normally elicit such a reaction. When we were traveling, Janet used to eat things like crickets and jellyfish without batting an eye. Be careful—guys like that will kill you without even batting an eye.
See also: batting, eye, without
Farlex Dictionary of Idioms.

without batting an eye

Lit. Fig. without showing alarm or response; without blinking an eye. I knew I had insulted her, and she turned to me and asked me to leave without batting an eye. Right in the middle of the speechwithout batting an eyethe speaker walked off the stage.
See also: batting, eye, without
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

without batting an eye

Showing no emotion, acting as though nothing were unusual. For example, Richard ate the snails without batting an eye. A related phrase is not bat an eye, as in He didn't bat an eye when she told him he was being laid off. These expressions, which use bat in the sense of "blink," date from about 1900.
See also: batting, eye, without
The American Heritage® Dictionary of Idioms by Christine Ammer.

without batting an eye

Betraying no surprise or emotion, remarking nothing unusual. Batting here is an older word for “blinking,” but the term dates only from the turn of the twentieth century. O. Henry used it in Whirligigs (1910): “I’ve stood by you without batting an eye, in earthquakes, fires, and floods.”
See also: batting, eye, without
The Dictionary of Clichés by Christine Ammer
See also:
  • without (even) batting an eyelash
  • without (even) blinking an eye
  • without batting an eye
  • without blinking an eye
  • heartstring
  • play on heartstrings
  • play on the/(one's) heartstrings
  • strike a chord
  • strike a chord (with someone)
  • strike/touch a chord