Meanings
From bat (“flutter”), circa 1900.[1]
How to pronounce "bat an eyelid":
AU
To react in any slight way; to respond; to care.
Example: "When laptop computers first came out they were something of a novelty. These days, nobody bats an eyelid."
Example Sentences
1
Even after hearing the shocking news, she didn't bat an eyelid.
2
He won a million dollars, but he didn't bat an eyelid.
3
When I told her I lost my job, she didn't bat an eyelid.
4
Despite the loud noise, the baby didn't bat an eyelid.
5
When he saw the huge spider, he didn't bat an eyelid.