An arm and a leg意思

"An arm and a leg" is an English idiom that means something is very expensive. It suggests that the cost of something is so high that it feels like you are being asked to give up a significant part of your body in exchange for it. This idiom is often used in a hyperbolic or exaggerated way to emphasize the high price of something. For example, you might say:

"I can't believe they're charging an arm and a leg for tickets to the concert!"

This means that the tickets are perceived as being very expensive, perhaps more than the person is willing to pay.