I was afraid it was going to be extremely gory, and it's not too far from it.
A young couple have car trouble (isn't that always the case) and they end up at an old woman's house.
She cooks for them and tells them the crazy fat dude at the kitchen table is her son. The son cannot
talk, just mumbles, shakes, and watch old black and white Popeye cartoons.
Apparently, according to some talk in the movie, there was some sort of drought or famine that wiped
out the cattle/meat population several years back.
That should be enough hint for you thus far.