Shuffling through the meat drawer, maybe you found a bag of pepperoni slices from when you tried to make pizza at home with the kids. That might have been weeks ago, but the pepperoni seems fresh. Does it ever really go bad?
Whole and unopened, a stick of pepperoni can be stored indefinitely in the fridge, or up to 6 weeks in the pantry. Once opened, a pepperoni stick will last up to 21 days and must be refrigerated. Slices will last up to 7 days after the best-by date if you have never opened them, and only about 5-7 days after you have opened the bag.