" Against the clock "
In a great hurry to complete something before a set deadline.
Sorry, no pub lunch for me today, I’m up against the clock. This report’s got to be done by 6pm or I’m dead.
Where did it originate?:
The United Kingdom, 20th century. The allusion being that someone is in a race against the clock.
Where is it used?:
Hear the idiom spoken: