sell-by date

noun2

1. •
   The latest date by which a perishable product should be sold to the public.
2. •
   An indication that something, or someone, is old and out of date.

   • September 9, 2017 - Schlock Mercenary Manifold: This is not a team, Petey. This is just another mass grave. Ewin: Eeew. What's the sell-by date on that manifold? I think it's gone bad.