Generally speaking, a caveman is an uncivilized homo sapiens. Ideally, they live in a cave and wear animal skins as clothing. While they might seem ignorant to progressive folk such as noders, they have probably learned a few important tricks, such as making fire without cigarette lighters, making clothes from a dead woolly mammoth, and fighting bears with nothing but a spear. Cavemen invented tagging, barbecue, camping and religion. If you see a pack of hooting, slant-browed humans carrying on bizzare rituals, check to see if they are all wearing baseball caps and Gap jeans, for this indicates that they are not cavemen but rather frat boys.