Backwoods

A couple go camping in the woods. When they're advised not to go in a certain direction, obviously, they venture there. When they save a little girl's life, the girl's hillbilly father invites them to dine with him and stay in their tent on his land. The next morning they meet his son- who just happens to be feral and likes to do things like biting the heads off chickens (hence the title of the movie).

Geek! Is also known as Backwoods in some territories.

The actual character of the geek (or William as he's known to his father) is very scary and very unsettling. There are shades of The Hills Have Eyes with Geek! As William's father confides that he once tried to kill his son as he knew he was possibly psychopathic.

This is a slow burn of a film but livens up when Billy Boy enters the fray (with drool dribbling from his chin).

Not bad. And in a subgenre that is overpopulated, I've seen much worse.