IdiomBody & SensesEnglish

shot in the arm

Meaning: Something that stimulates, boosts, or renews people's interest.

Example: “The new factory was a shot in the arm for the local economy.”

Origin: From the injections of medicine, and of drugs, given in the arm, which could quickly revive a patient. American slang used it figuratively for any boost from the 1920s.

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