on the double

listen to the pronunciation of on the double
Английский Язык - Турецкий язык
çok çabuk
(Askeri) KOŞAR ADIM: Bak. "double" ve "doubletime"
Английский Язык - Английский Язык
rapidly or immediately

Fortunately, help arrived on the double, and the victim's injuries were soon treated.

immediately, right now, at once
on the double
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