I just ate a Slim Jim with an expiration date of February, 1973.
No problemo! :-)
My father cooked up some bacon back in the day... It stunk to high heaven and was obviously as rotten as hell... Us kids refused to eat it, but he did and nothing happened to him... He always saved the bacon drippings to enjoy latter by spreading them on toast. It almost makes me hurl to this day...LOL
Of course, nothing was ever going to happen to him. Especially after surviving the Korea war where he lost his lieutenant and several other soldiers from his company. He had urinary tract cancer, prostate cancer and cancerous polyps... Smoked and drank until the day he died at 88 years old. Tougher than nails.