your, its, etc. days are numbered

(someone's or something's) days are numbered

Someone or something is soon to die or end. Often used hyperbolically or humorously when suggesting someone is going to die. If news of this gets out to the public, your days as a senator are numbered! My phone's days are definitely numbered—the battery won't last more than an hour. The captain of the wrestling team found out that I kissed his girlfriend, so my days are numbered now!
See also: days, number

your, its, etc. days are ˈnumbered

somebody has not long left to live; something will not last much longer: Now that we’re no longer getting any government support, the theatre’s days are numbered.
See also: days, number