clock is ticking, the

(the) clock is ticking

1. There is only a finite amount of time left. The clock is ticking, so be sure to complete your exams efficiently so you don't have to skip questions. They have a chance to tie the game, but the clock is ticking. I know it is a pessimistic view, but in my mind, the clock is ticking on the human race.
2. Of a woman, there is a limited amount of time in which to be able to conceive a child. I've been very successful in my career and want to see it to its fullest, but I would also love to have kids, and I know my clock is ticking. For women who may want to have children, the clock is always ticking—a concern that men never have to worry about.
See also: clock, ticking
Farlex Dictionary of Idioms.

clock is ticking, the

The time (for something to be done) is passing quickly; hurry up. For example, The clock is ticking on that project. This allusion to a stopwatch is often used as an admonition to speed something up. It also is used in more specific form- one's biological clock is ticking-meaning that a woman may soon be too old to bear a child, as in Her biological clock is ticking-she just turned forty.
See also: clock
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • (the) clock is ticking
  • ticking
  • (the) clock is running
  • save time
  • don't cry before you are hurt
  • I have only got one pair of hands
  • get in the swing of things
  • get in/into the swing
  • get into the swing of it/things
  • get into the swing of things
References in periodicals archive
The clock is ticking, the girl is still alive and the listener knows where she is, but the FBI is slowly, painstakingly combing huge amounts of land.