Top Definition
an overtly sassy dinosaur with thunderthighs. Known to create drama amongst the other happy little herbavours. Unlike most dinosaurs of its era, the sassosaurus feeds off the angst and misery of its prey, as it shoots dagger glares and bitchy remarks at the weakest unsuspecting of the already emotionally unstable teenage dino population. Well known by paleontologists as the bitchiest of all dinosaurs. Modern female is said to have evolved from the sassosaurus.
look at those thunderthighs! she must be a sassosaurus rex!

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