Way Past Expiration
seems too broad for this trope, which is specifically about food — that title keeps making think about an episode of The Simpsons
(I think it was a Treehouse of Horror
) where Willie gets set on fire, and tries to put it out with a fire extinguisher, but it failed because the cheapskate PTO voted against having the expired extinguishers recharged by the fire department (despite it being free
Anyway, I'd suggest Extremely Expired Food
for the trope as described. Of course, looking at the examples
, about half of them are just "expired food" instead of "food that expired an extremely long time ago".