تعریف و معنای "call one's bluff"

What is the origin of the idiom "call one's bluff" and when to use it?

The idiom "call one's bluff" originated from the game of poker, specifically from the action of challenging an opponent's bluff by demanding that they reveal their hand. In poker, a bluff occurs when a player makes a deceptive or false move to deceive others into believing they have a stronger hand than they actually do. This phrase figuratively refers to the act of challenging or demanding proof of someone's claims, threats, or assertions. It implies that the person is being called out on their bluff or challenged to provide evidence or follow through with their stated intentions.