In this movie, people become zombies by repeating too many politically-correct statements. The few remaining free-thinkers fight for survival. The reason why the movie is called "Dickless Zombies" is because conformists remove the genitals of any zombie that is killed - the elements would degrade the clothing, which would result in the penis being revealed to any passerbyer. (No, there isn't any depiction of this removal on screen). This shows how stupid average Americans are.

A group of New Yorkers take a road trip to Texas, to visit the locations from the Texas Chainsaw Massacre. Their car is disabled. As they wait in a desolate part of the state, a hiker discovers the travelers and offers refuge at her home, which happens to be five hours away by foot. When the gang arrives at what looks like a hovel, their northern attitudes and prejudices clash with the southerners, and a sadistic game ensues. All will learn what it means when someone says, "Don't mess with Texas."