Examples:

• He was living on borrowed time, and everyone in my family knew it.
• This realm of yours is living on borrowed time.
• I guess I've just been living on borrowed time.
• You and I both know I'm living on borrowed time.
• That means you've been living on borrowed time for 12 years.
• That means you've been living on borrowed time for 12 years.
• The threat is real. In a sense, we are living on borrowed time.
• He's living on borrowed time and she knows it.
• It means we are living on borrowed time, all of us.
• They are living on borrowed time and know that their days are numbered.