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.