call sb's bluff (challenge someone to substantiate their claims, to show that they are not being deceptive and can actually do what they say they can do ) — вывести на чистую воду (разоблачить обман, заставив раскрыть карты); не поддаться на провокацию; не дать взять себя на пушку
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Origin
In poker-playing a bluff is a display of confidence (perhaps from a Dutch word for boast) such as heavy betting on one's own weak hand to deceive opponents and cause them to throw up their own stronger hands and lose their stakes. To 'call' such a bluff is to remain in play and require the bluffer finally to show what cards are held; a call is simply a demand that a player reveal his hand because his bet has been equalled.
also
уличить во лжи
[вывести на чистую воду]