Your number is up
Definition 1 of 1
Pro Tip 1/3Bad Omen
The phrase often carries a negative or ominous tone, implying unavoidable bad fortune. 
She sneaked into the club, but her number is up if she's caught.
Pro Tip 2/3Not Literal
It's not about actual numbers; it's a metaphor for impending consequences or the end of a situation. 
He dodged his responsibilities, but now his number is up.
Pro Tip 3/3Imminent Outcome
Suggests something is about to happen very soon, often something inevitable or inescapable. 
With the evidence piling up, her number is up.