You know what it looks like… but what is it called?
TAKE THE QUIZ“not bat”
The following 2 entries include the term not bat.
not bat an eye/eyelash
idiom: to show no surprise, fear, concern, etc.
not bat an eyelid
idiom: to show no surprise, fear, concern, etc. : not bat an eye
Love words? Need even more definitions?
Merriam-Webster unabridged