Definition
To challenge someone to follow through with a threat or claim that you believe is not genuine.
揭穿（某人的）虛张声势
He bragged about quitting his job, so I decided to call his bluff.
他吹嘘要辞职，所以我决定要求他兑现。
The negotiators threatened to walk away from the table, but they didn't expect the other side to call their bluff.
谈判者威胁要离开谈判桌，但他们没想到对方会要求他们兑现。
When she said she would tell the manager, I thought she was bluffing, so I called her bluff.
她说要告诉经理时，我以为她在虚张声势，所以我要求她兑现。