What is another word for on the double?
Pronunciation: [ɒnðə dˈʌbə͡l] (IPA) 
On the double is a phrase that indicates urgency or the need to act quickly. In today's fast-paced world, businessmen, academics, and students often use on the double to convey a sense of urgency. Synonyms for on the double include immediately, pronto, right away, at once, swiftly, without delay, and post-haste. These words bear the same urgency as on the double and can be used interchangeably. People use these synonyms in many situations, including emergencies, critical deadlines, and rushed deliveries. All of these synonyms have one thing in common- they all indicate the need to act with swiftness and urgency.
