more then you could give or pay then priceless bodily limbs, that are expensive on black market
"An arm and a leg" is an idiom that means an exorbitant or very high price paid for something. "Jeeze, did you see that they're charging an arm and a leg for a gallon of gas these days!"
An idiom is an expression that has a meaning different from what it literally says. For example, one can say that something expensive costs an arm and a leg, although clearly the point made is different from what the individual words mean.
American slang from 1960's, possibly from Vietnam, meaning 'costing a lot.'
(The idiom means "expensive" or "overpriced.")"That waterfront property will cost me an arm and a leg.""Don't lose that watch, because it cost me an arm and a leg."
Oh yes, that is an idiom. There are no transactions in which someone literally gives one of his or her arms and legs as payment.
get a leg up on
This is not an idiom that I have ever heard. Perhaps you mean an arm AND a leg, which is an exaggerated way of saying something is really expensive.
An idiom is an expression that has a meaning different from what it literally says. For example, one can say that something expensive costs an arm and a leg, although clearly the point made is different from what the individual words mean.
American slang from 1960's, possibly from Vietnam, meaning 'costing a lot.'
(The idiom means "expensive" or "overpriced.")"That waterfront property will cost me an arm and a leg.""Don't lose that watch, because it cost me an arm and a leg."
Oh yes, that is an idiom. There are no transactions in which someone literally gives one of his or her arms and legs as payment.
This leg of mine, do you want to buy it? It costs an arm and a leg.
It costs an arm and a leg
In brief it seems falsely translated from the common idiom 'to pull someone's leg', which has the meaning "to trick/fool/kid someone". For example: "Are you pulling my leg?" (Br.) / "Are you kidding me?" (Am.)
Then you will remain short. There is human growth hormone available, but not much and it costs an arm and a leg.
get a leg up on
your leg
A arm