What does the idiom ‘let the cat out of the bag’ mean?

Explanation

‘Let the cat out of the bag’ is an idiom meaning to accidentally or carelessly reveal a secret, as in ‘She let the cat out of the bag about the surprise party.’ The phrase is believed to originate from old marketplace scams, where a worthless cat might be substituted for a valuable piglet in a bag, with the deception revealed only if the bag were opened. Explore more English MCQs on mcqstutor to keep practicing.