over the hill
US /ˌoʊvər ðə ˈhɪl/
UK /ˌoʊvər ðə ˈhɪl/

1.
passado, velho demais
past one's prime; too old to be useful or effective
:
•
Some people think that once you reach 40, you're over the hill.
Algumas pessoas pensam que, ao chegar aos 40, você já está passado.
•
Despite being over the hill, the veteran athlete still competed in the marathon.
Apesar de estar passado, o atleta veterano ainda competiu na maratona.