call someone's bluff

idiomatic

(idiomatic) To take action on the basis that another person is bluffing.

Japanese Meaning

相手の虚勢を見抜き、真意を確かめる / 相手のブラフを暴くために行動を起こす

When he threatened to quit unless promoted, we decided to call someone's bluff and continued the project.

彼は昇進がなければ辞めると脅しましたが、私たちは彼のはったりを見破ってプロジェクトを続けることにしました。

Sense（1）

(idiomatic) To take action on the basis that another person is bluffing.

She was tempted to call his bluff, hardly believing that he would carry out his threat.

calls someone's bluff

（ present singular third-person ）

calling someone's bluff

（ participle present ）

called someone's bluff

（ participle past ）

called someone's bluff

（ past ）