It Cost an Arm and a Leg Watch this on YouTube here - Shopping Video - YouTube Video Meaning: It cost an arm and a leg means that the item costs a large amount of money. "Wow, that Jewelry cost us an arm and a leg." Origin: This idiom has a few theories. The oldest being that portrait painters use to charge more for larger pain. A head and a shoulder painting was the cheapest option, followed in price by one which includes arms, add finally the top of the range was legs and all portrait. Anos so often with popular tales, there is not truth in that story. Painters certainly did charge more for larger pictures, but there's no evidence to suggest they did so by limb count. Another theory was that the phrase started during the 20th century, possibly during one of the major world wars. The idea being that soldiers, because of their heavy involvement in war and being in the line of fire, could possibly lose a hand, foot, leg, or arm. Thus the war would literally cost a perso...