From Longman Dictionary of Contemporary Englisha shot in the arma shot in the armCONFIDENTsomething that makes you more confident or more successful The new factory will give the local economy a much-needed shot in the arm. → shot
Examples from the Corpus
a shot in the arm• The new factory will give the local economy a real shot in the arm.• Coming back will be a shot in the arm.• In 1922 it received a shot in the arm through a large subsidy from the Central Committee.• It now had the effect of a shot in the arm.• It was like a shot in the arm for us, and our tiredness fell away.• On the Conservative side, the decision of Callaghan not to hold an election came as a shot in the arm. 