鳩が豆鉄砲を食ったよう
Meanings
1
wide-eyed in shock; dumbfounded
Idiomatic simile describing someone's stunned, wide-eyed expression, like a pigeon suddenly hit by a pea shooter. Often used with verbs like する or なる.
At the sudden news, he looked like a pigeon shot by a peashooter—completely dumbfounded.
I was so stunned I couldn't speak for a while, like a pigeon hit by a peashooter.