a situation in which there is twice the number of problems that usually exist: Having twins usually means double trouble for the parents. Want to learn more?

Is Double Trouble an idiom?

Someone or something that is very bothersome or problematic.

What does it mean when someone says on the double?

Very quickly, as in You'd better get here on the double. This expression, also put as at the double, came from the military, where it means “double time”—that is, marching twice as fast as normally. [ Early 1800s]