I'd probably give it a host since it's not terribly expired. I'd see if it pops well but also makes sure it doesn't smell/taste "off" at all. Butter expires for sure so I'd want to make sure that the butter (or "butter flavor") aspect of the popcorn was still good too.
Re: NBR (again) Does microwave popcorn really expire?
"yah it does. I tried to make some that had and it just wouldn't hardly pop. I got like five kernels to go."
Ditto! And the unpopped kernels burned. yuck!
This.