Allosaurus (æləˈsɔ rəs) is a genus of carnivorous theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period (Kimmeridgian to early Tithonian). The name "Allosaurus" means "different lizard" alluding to its unique concave vertebrae (at the time of its discovery). It is derived from the Greek ἄλλος/allos ("different, other") and σαῦρος/sauros ("lizard / generic reptile"). The first fossil remains that could definitively be ascribed to this genus were described in 1877 by paleontologist Othniel Charles Marsh. As one of the first well-known theropod dinosaurs, it has long attracted attention outside of paleontological circles. Indeed, it has been a top feature in several films and documentaries about prehistoric life.
As the most abundant large predatory dinosaur in the Morrison Formation, Allosaurus was at the top of the food chain, probably preying on contemporaneous large herbivorous dinosaurs, and perhaps even other predators. Potential prey included ornithopods, stegosaurids, and sauropods. Some paleontologists interpret Allosaurus as having had cooperative social behavior, and hunting in packs, while others believe individuals may have been aggressive toward each other, and that congregations of this genus are the result of lone individuals feeding on the same carcasses. Due to having a much weaker bite force and a much wider gape than most other large carnivorous dinosaurs, it may have attacked large prey by ambush, using its upper jaw like a hatchet.
by WhoDatFreshBoi December 8, 2018
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A Jurassic dinosaur represented by 4-6 identified species. Ranging in length from 5-13.5 meters, it was one of the largest carnivores until the rise of the tyrranosaurids about fifty million years later.
"The genus Allosaurus has been discovered in Upper Jurassic sediments (160 million years ago) in the U.S. "
by Ariadne December 2, 2003
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Allosaurus is sometimes used as a term for Neurotypicals who defend ableism, or things that directly result in ableism, Neurobias, non-inclusivity, and related issues due to a resistance to change or other traditionalist values.

The perception or one as an Allosaurus is that the problem likely stems from the person being stuck in the past.

In rare cases, a Neurodivergent projecting internalized ableism from Neurotypicals onto other Neurodivergents might also be referred to as an Allosaurus.

While the term is derived from the common rootword "Allos" in Allosaurus and Allistic, suggesting a focus on Autism. Thiscan be applied in relationship to to dynamics between other Neurodivergents and well.
"We're just asking for you to note when you're being sarcastic, don't be such an Allosaurus."

"Many Autistics feel that Autism Speaks is an Allosaurus of a nonprofit that is on it's way out due to it's controversial past."

Allosaurus (Allistics)
by Neuroquid June 14, 2021
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Pr0n featuring one or more allosaurus. WARNING: may cause EXTREME ORGASM!
mmm... Allosaurus pr0n... *spl00ges*
by PhuckYou September 23, 2003
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The main protagonist of IanTheAllosaurusDX's story of the same name. He is a red kanjitraxxian Allosaurus. He runs fast like Sonic.
by IanTheAllosaurusDX October 30, 2023
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THE ALLOSAURUS is a specific person who will always act like a scalie, act retarded and mostly play lego games and not do his job. THE ALLOSAURUS is also a young adult who primarily feasts on children, disguising themselves as a teacher and then ambushing his prey, toddlers.
THE ALLOSAURUS takes what it wants

THE ALLOSAURUS keeps moving forward (until it destroys it's enemies)