I think this is a comedy, perhaps a horror movie about zombies.

All I remember is one scene where the young guy goes to I believe it's his mom's grave. He digs her up and her skeleton is alive. He takes off her head and she asks for a kiss or something and when he does, she bites his lip and doesn't let go.

It was supposed to be funny, not scary.

Hope someone knows! Thanks!

I think it might be this one...
Aka Revenge Of The Living Dead

Return of the Living Dead Part II (1988) - IMDb user reviews

No, that's not it. I believe I remember that one. Where the little boy is bullied by some kids in a sewer when they find the barrel thing with the zombie, and one of the boys gets infected...

Thanks, but not it. Man... if only there weren't 20287468193 zombie movies, lol.

I've been asking around about this movie for months and the answer fell into my lap today. It's called Ed and His Dead Mother. I can't wait to watch it, and hopefully you're still interested as well :)

YEEEES!! Awesome, thank you!!