Slip through your fingers

Photo of a man with sand slipping through his fingers
To have something slip through your fingers means to lose something because you were unable to hold onto it or stop it from happening. This idiom is used to describe missed chances, lost opportunities, or things that gradually disappear despite your efforts.

The phrase comes from the image of trying to hold something small, like sand or water, that slowly falls between your fingers. Because it cannot be easily held, it becomes a metaphor for something that cannot be kept.

The job offer slipped through his fingers when he missed the deadline to reply.