idioms using “double”

On the double

As quickly as possible

“Bring me the latest quarterly figures on the double.”

Double as

To serve two functions

“This conference room doubles as the president’s office when he visits our plant.”

Double down

To work harder than ever

“We’ll just have to double down to find new business now that we’ve lost a major client.”

Double up

Work in pairs

“Can you double up on the textbooks? We only have one book for every two students.”

Do a double take

Take two quick looks in succession

“Takahashi-san looks so much like his brother that I did a double take.”