From Longman Dictionary of Contemporary Englishswing into actionswing into actionto suddenly begin work that needs doing, using a lot of energy and effort Politicians have already swung into action. → swing
Examples from the Corpus
swing into action• All this would have rotted away had the rescue operation not swung into action.• The moment the shooting was reported, they swung into action.• Throughout the region voluntary agencies like the Red Cross are swinging into action.• Whenever the laws of any state are broken, a duly authorized organization swings into action.• When he swings into action on the water, Kerton is one of the fastest men afloat.• The first battalion of boffins will swing into action this August.• The doctor examined her, found a faint pulse, and immediately swung into action to resuscitate the patient.• The nights really begin to swing into action with regular party nights in the bar. 