Region: General | Usage example: They called his bluff and discovered the promise had no funds behind it.

Call the bluffs

Meaning

Challenge someone's false claims or threats.

Used when someone doubts a bold statement and demands proof.

Origin notes can vary by region and source; this page gives the commonly reported explanation and usage context.

Gambling term from card games where players bluff.

Adopted widely in business and politics during the 20th century.