double
at (or on) the double at running speed; very fast.
☞ This modern generalized sense has developed from the mid-19th-century military use of double pace to mean twice the number of steps per minute of slow pace.
double bubble a doubly satisfying outcome; two for the price of one. British informal
2005Dooyoo.co.uk discussions: Terrorism Some will give their cause a religious stamp of approval, combining a fear of their God with the fear of their behaviour, which is double bubble as far as the terrorist is concerned.
double or nothing a gamble to decide whether a loss or debt should be doubled or cancelled.
☞ A British variant of double or nothing is double or quits.