over the hill
idiomPart ofhill
over the hill — idiom
1. no longer young; often used humorously to say that someone is too old to be usef
1.idiom
Definition
no longer young; often used humorously to say that someone is too old to be useful, attractive, or able to do things well
Example
Some people think that once you turn fifty, you are over the hill, but that is simply not true.
Adaeze laughed when her nephew said she was over the hill — she had just run a marathon.