call one's bluff

1. 1.

   ask to prove what someone is claiming

   “John called Mary's bluff when she claimed she could prove the theorem in under an hour”

   Broaderchallenge

Questions about call one's bluff

What does call one's bluff mean?

call one's bluff means "ask to prove what someone is claiming".

Is call one's bluff a common word?

call one's bluff is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.