Number is up - Idioms by The Free Dictionary
your/somebody's number is up (redirected from number is up)
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(one's) number is up
It is one's time to die, suffer, or be punished. My only wish is that I don't feel any pain when my number is up. This evidence proves that the senator was part of the conspiracy. His number's up this time.
your/somebody’s number is ˈup (informal) somebody is about to die or experience something very unpleasant: There’s no point worrying about getting killed in a plane crash. When your number’s up, your number’s up. ♢ The police have the evidence they need to arrest him, so it looks as if his number’s up.