would give your right arm for
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!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
would give your right arm forbe willing to pay a high price for; greatly desire to have or do. informal
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