Bistahieversor sealeyi is a genus of tyrannosauroid dinosaur. It lived around 75 million years ago during the Late Cretaceous, New Mexico.
The name Bistahieversor comes from the Navajo BistahÃ, where it was found, and eversor, meaning "destroyer".
Adult Bistahieversor are estimated to have been around 9 meters (30 ft) long, weighing at least a ton.