Definition of cost an arm and a leg
informal
: to be too expensive
I want a new car that doesn't cost an arm and a leg.
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“Cost an arm and a leg.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cost%20an%20arm%20and%20a%20leg. Accessed 23 Jun. 2021.
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