to call someone'bluff解释这个词组,关于商务英语方面的解释!please translate it in English

call someone's bluff
Fig. to demand that someone prove a claim or is not being deceptive

call someone’s bluff
就是「对某人所言有疑虑，认为他是在虚张声势，要求对方亮 底牌」。

call sb.'s bluff:
v.诱使某人交底

有人致电 ' 芬