without batting an eye

Adverb

not-comparable

Showing no emotional reaction.

Japanese Meaning

感情の動揺や反応を示さない様子 / 無表情で冷静な状態

He told the unbelievable story without batting an eye.

彼は信じられない話を少しも動じることなく語った。

Sense（1）

Showing no emotional reaction.

Now here she was dropping almost $5,000 on a single outfit without batting an eye.