Cost aa and a leg意思

"Cost an arm and a leg" is a common English idiom that means something costs an exorbitant amount of money, often used to express frustration or surprise at the high price of something. It suggests that the cost is so high, it feels like one has had to sacrifice a limb to afford it. The idiom is used figuratively and does not imply that someone has actually lost a limb in exchange for a purchase. It is used for emphasis and to exaggerate the point that something is very expensive.