Yup, peanuts, just like hazelnuts or walnuts, can go rancid. That's due to the quite high fat content. And, if you store them well, it's more likely they'll go rancid than straight off bad.

Can you eat expired roasted peanuts?

You can eat nuts that have expired as long as the oils in them haven't become rancid. Typically, you can eat nuts 6 months after the printed date in the pantry, 1 year after the date if they're in the refrigerator and 2 years after the date if they're in the freezer.

CAN expired peanuts make you sick?

You probably won't be sick after eating a handful of rancid peanuts. But doing so is neither good for your health, nor they are any good when it comes to taste. ... That said, before you eat any old peanuts and check for rancidity, look for the usual signs of food being bad: mold or discolorations (black spots, etc.)