Vocabulary
ピンと立てる
ピンとたてる
to prick up (e.g. ears); to cock (up); to perk up
expression
verb
Example sentences
その犬(いぬ)はその音(おと)を聞(き)いて耳(みみ)をピンと立(ぴんとた)てた。
The dog pricked up his ears at the sound.