be past your sell-by date
US /bi pæst jʊər ˈsɛlˌbaɪ deɪt/
UK /bi pæst jʊər ˈsɛlˌbaɪ deɪt/

1.
passar do prazo de validade, não ser mais útil
to be no longer effective, useful, or desirable, often because of age or changing circumstances
:
•
Some critics say the band is past their sell-by date and should retire.
Alguns críticos dizem que a banda já passou do prazo de validade e deveria se aposentar.
•
She felt she was past her sell-by date in the corporate world.
Ela sentia que já tinha passado do prazo de validade no mundo corporativo.