(someone or something's) days are numbered
Said when someone or something is soon to die or end. Often used hyperbolically or humorously when referring to people. The captain of the wrestling team found out that I kissed his girlfriend, so my days are numbered now! My phone's days are definitely numbered—the battery won't last more than an hour.
days are numbered, one's
Also, its days are numbered. The usefulness or life of someone or something is nearly ended. For example, When they announced the layoffs, she knew her days at the company were numbered, or My car's days are numbered-the transmission is shot. A version of this expression appears in the Bible (Daniel 5:26): "God hath numbered thy kingdom and finished it." It came into common use in the late 1800s.