Ok. So I've been looking for a horror movie that's a bit old I think, I believe it would be in the sci-fi genre. Anyway... All I remember is I saw it when I was young and near the end of the movie there are these 2 occult guys or something and this one male and female cop I believe are trying to stop them. I forgot how one of the occult guys die but one of the occult guys does have his head fall right into a girls stomach that has a mouth and his head gets bitten clean off. I think they tried to destroy the girl too can't be clear. Anyway... At the end of the movie this one guy driving a car picks up the girl with the mouth on her stomach on the side of the road. (Think she survived somehow or something.) And I believe he asks "What's you're name baby?" Then she replies. "My name is shentar." In a demonic sounding voice then she gets in the car and they drive off. Don't quote me on that last line though as I saw that movie around the time I was 10 and am now 21. Help would be appreciated, thanks. ^^

Maybe Blood Diner? Here's a snippet from a review on IMDB mentioning the same things you did:

The plot is the purest nonsense - a mad scientist winds up disembodied, a brain in a jar if you will, and decides that the only thing to do is to construct a perfect female specimen in order to revive an ancient She-God who goes by the name of Sheetar. He enlists the help of a pair of cannibal locals, and the bits of the women they don't use go into the food at the diner they run, making their veggie burgers by far the best in town. Cue loads of ridiculous gore and general mayhem.

There are some wonderfully odd moments; the naked woman who 'turns' - one minute victim, the next karate chopping avenger; the guitar playing Hitler's and the stomach with teeth,
http://www.imdb.com/title/tt0092669/

Maybe Blood Diner? Here's a snippet from a review on IMDB mentioning the same things you did:

The plot is the purest nonsense - a mad scientist winds up disembodied, a brain in a jar if you will, and decides that the only thing to do is to construct a perfect female specimen in order to revive an ancient She-God who goes by the name of Sheetar. He enlists the help of a pair of cannibal locals, and the bits of the women they don't use go into the food at the diner they run, making their veggie burgers by far the best in town. Cue loads of ridiculous gore and general mayhem.

There are some wonderfully odd moments; the naked woman who 'turns' - one minute victim, the next karate chopping avenger; the guitar playing Hitler's and the stomach with teeth,
Blood Diner (1987) - IMDb (http://www.imdb.com/title/tt0092669/)

YES! That was it! Thank you very much! ^^

:)