A shot in the arm
Meaning
Something that boosts morale or energy.
Usage
Often used in business or sports contexts to describe a revitalizing change.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Metaphor from medicine, where an injection delivers a quick boost.
Became popular in the mid-20th century when medical metaphors infiltrated business writing.