What idiom uses the word "cat"?

What idiom uses the word "cat"? - briefly

The idiom "let the cat out of the bag" means to reveal a secret or disclose information that was supposed to remain hidden.

What idiom uses the word "cat"? - in detail

One well-known idiom that incorporates the word "cat" is "let the cat out of the bag." This phrase originates from the 18th century and is believed to have roots in market practices of the time. Sellers would sometimes deceive buyers by placing a piglet, a valuable commodity, in a bag for sale. However, unscrupulous sellers might replace the piglet with a less valuable cat. If the cat escaped from the bag, the deception would be revealed. Over time, the expression evolved to mean accidentally or intentionally revealing a secret or disclosing information that was meant to be kept hidden. Another related idiom is "curiosity killed the cat," which warns against excessive inquisitiveness or meddling in matters that do not concern one. This saying emphasizes the potential dangers of being overly curious, though it is often used humorously or lightheartedly in modern contexts. Both idioms demonstrate the versatility of the word "cat" in English expressions, illustrating its role in conveying caution, revelation, or unintended consequences. These phrases remain widely used today, enriching the language with their vivid imagery and historical significance.