be living on borrowed time

Từ điển Oxford Advanced Learner 8th

be (living) on borrowed ˈtime idiom
1. to still be alive after the time when you were expected to die
•He's been living on borrowed time ever since his last heart attack.
2. to be doing sth that other people are likely to soon stop you from doing
•According to the latest opinion polls, the government is living on borrowed time.
Main entry: ↑borrow_idiom