COST AN ARM AND A LEG

cost an arm and a leg: translation

cost a pretty penny & cost an arm and a leg & cost the earth

Fig. to be expensive; to cost a lot of money. •

Mary's dress is real silk. It must have cost a pretty penny.

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Taking care of a fancy car like that can cost a pretty penny, let me tell you.

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It cost an arm and a leg, so I didn't buy it.

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A house that size with an ocean view must cost the earth!