A prehistoric beast known to have survived the great extinction by fucking everything such as trees, T - rex's, rabid cows, feral cats, and your friend named john. Known to swallow whole bananas in time of great hunger. Does not breathe air. Usually is a bitch.
n. a peculiar melange of the words skank and tyrannosaurus, implying that the recipient of the comment is, as tyrannosaurus was the entitled the "tyrant lizard", the king/queen of all skanks.
"Latoiya is such a skankosaurus. It was bad enough that the biotch had to sleep with my boo, but now my grandpa! I hope that slut gets herpes!"
An alpha breed of Smarmosaur that specializes in being a jerk who tries to get suave with the ladies, but fails due to him not realizing he is coming off as an idiot.
" See that guy Gavin over there? He's known as the Smarmosaurus Rex, he's the only guy who tries that hard to get suave with all the ladies. He's not very likable since he ends up being insincerely ingratiating.