(as) old as time
1. Having existed forever or been eternally true. Often used humorously or hyperbolically. The human instinct to innovate is as old as time itself. Teenagers defying their parents—it's a tale as old as time! The rivalry between these two teams is old as time.
2. Extremely old. Eh? You'll have to speak up, my dear. I'm old as time, so my hearing's not what it used to be. Why don't we ever sing new songs? Those hymns are as old as time. She had a phonograph when she was a child? She must be as old as time.
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