give right arm
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give (one's) right arm
A figurative phrase that highlights one's interest in having something or eagerness to do something. A: "I'm going to the concert on Saturday!" B: "Aw man, I would give my right arm to have tickets to that!" I would give my right arm for your sister's gorgeous hair!
give one's right arm (for someone or something)and give one's eyeteeth (for someone or something)
Fig. to be willing to give something of great value for someone or something. I'd give my right arm for a nice cool drink. I'd give my eyeteeth to be there.