The term 'Primitive Guys' is a reference to Cavemen, which is a term used to describe early humans who lived in caves and used primitive tools and weapons. They were hunter-gatherers who relied on their environment for food, shelter, and clothing. Cavemen were the first humans to use fire and develop language and communication skills. They were also the first to create art and music. Primitive Guys is a term used to refer to these early humans and their lifestyle.