What is the laziest dinosaur?

The laziest dinosaur is often considered to be the BrachiOSaurus. This massive herbivore, with its long neck and large body, likely spent much of its time grazing on vegetation without much need to move quickly. Its size and feeding habits suggest a more sedentary lifestyle, allowing it to conserve energy while reaching high leaves in trees. However, it's important to note that "laziness" in dinosaurs is a subjective interpretation, as their behaviors were likely adapted to their environments and survival needs.