Cost an Arm and a Leg

The Definition

To be exorbitantly expensive; to require a payment that feels like a literal sacrifice of one's own body parts. It describes an item or service whose price is so high it seems almost predatory or ruinous.

The Deep Dive

This is a "high-stakes" piece of junk knowledge that sits at the intersection of Fine Art history and Military medicine. While it sounds medieval, the phrase is surprisingly modern.

  • The Portrait Theory (The "Grand Pose"): A popular—though likely "junk"—legend from the 18th century suggests that portrait painters like Joshua Reynolds or Thomas Gainsborough charged based on how much of the body they had to paint.

    • A simple head-and-shoulders "bust" was the cheapest.

    • Including the arms (hands are notoriously difficult and time-consuming to paint) increased the price.

    • A full-length portrait, including the legs, was the most expensive of all. Therefore, a top-tier painting literally "cost an arm and a leg."

  • The Post-War Reality (The True Origin): Despite the charm of the painting theory, the phrase doesn't appear in print until the late 19th century, and it didn't become a common idiom until after World War I and World War II.

    • During these conflicts, thousands of soldiers returned home having lost limbs to artillery and landmines.

    • The "cost" of the war was measured in the literal arms and legs left on the battlefield. To buy something that was "worth an arm and a leg" was a somber reference to the ultimate price paid for freedom and survival.

The phrase reached peak popularity in the 1940's. It was first recorded in its modern form in a 1949 food advertisement, ironically used to describe the high price of meat—a "fleshy" pun that eventually lost its dark edge and became a standard way to complain about the price of a new car or a gallon of gas.

Fast Facts

  • The "French" Connection: The French have a similar idiom: Ça coûte les yeux de la tête ("It costs the eyes from your head"). This suggests that across cultures, humans naturally equate high prices with the loss of vital organs.

  • The "Half a Kingdom" Link: In fairy tales, the price is often "half the kingdom," but in the gritty reality of the 20th century, we traded land for limbs in our metaphors.

  • The First Print: The Long Beach Independent (California) used the phrase in 1949 to describe the high cost of living, cementing it as the go-to Americanism for "overpriced."

References

  • Ammer, C. (2013). The Dictionary of Clichés. Skyhorse Publishing.

  • Flexner, S. B. (1982). Listening to America. Simon & Schuster.

  • The Oxford English Dictionary. (2026). Arm (n.1). Oxford University Press.

  • Gainsborough, T. (1770). The Blue Boy. (Example of a 'full-cost' portrait).