Bumosaurus Rex 

the biggest bum on the planet.

Dylan: Hey man, get i get a cig from ya?
Luke: Dude go buy your own, your such a bumosaurus rex.

Bumosaurus Rex by Retrogress April 5, 2011

bromosaurus rex

a large-scale brosef; one who has been a brosef since ancient times.

sup brosef?
bromosaurus rex! how's it hanging?

bromosaurus rex by elPenetrator February 15, 2010

bunsosaurus rex 

One who likes to bite down on the buns of another with or without permission.

I cant believe he just walked up and bit her butt, what a bunsosaurus rex

bunsosaurus rex by Mr. Bunsosaurus January 25, 2008

buckosaurus rex 

Someone that is able to buck (fail) to the highest possible amount. Bucking to the maximum.

Yo dude, Alex over there is a huge buckosaurus rex.
Ya man I've never seen someone buckle so hard before

buckosaurus rex by Othaos June 24, 2010