as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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describe the meaning of the idiom cost an arm and a leg.
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the idiom "cost an arm and a leg" means that something is extremely expensive and costs a lot of money. it can be used figuratively to describe anything, from material possessions to experiences, that require a significant amount of money to obtain. it suggests that the cost is so great it may have cost a part of the speaker's body!
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