Scum of the Earth (1974)
aka
Poor White Trash Part II
Helen Fraser (Norma Moore), a pretty city girl on vacation with her hubby Paul, flees into the Texas backwoods after finding her spouse dead (having lost an argument with the business end of an axe!). Panic-stricken, she runs into redneck Odis Pickett, who takes her back to his cabin to meet the family: pregnant wife Emmy, daughter Sarah and idiot son Bo. But rather than call for help, Odis proceeds to subject Helen to a night of drunken abuse, culminating in rape.
And all the while, a murderer lurks in the woods outside, waiting to kill again.
Scum Of The Earth (AKA Poor White Trash part 2), by director S. F. Brownrigg, may not feature the highest of production values, and might be a mite talky for many people, but with a script that delivers some of the funniest hillbilly dialogue in the history of cinema (this one packs in every clichéd redneck saying in the book), great characters (think the Clampetts, only not so clever), and a smidgen of incest, rape and murder, it's difficult to resist the film's sleazy exploitation charms. (IMDB BA_Harrison)