I don’t know where you got that idea, but it’s wrong; it means “fearsome lizard”. Incidentally, ConservPride is commiting the logical fallacy known as argumentum ad etymologiam.
argumentum ad etymologiam
Silbentrennung
ar·gu·men·tum ad etymologiam
Etymologie
() Latin argūmentum (“argument, evidence, proof”) + ad (“to, toward”) + etymologiam, accusative form of etymologia (“etymology”)