CALL ONE'S BLUFF

Pronunciation (US): (GB):

Meaning:

Ask to prove what someone is claiming

Example:

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

Classified under:

Verbs of telling, asking, ordering, singing

Hypernyms (to "call one's bluff" is one way to...):

challenge (issue a challenge to)

Sentence frame:

Somebody ----s