Originally a dinosaur that became extinct in the Jurassic period with a big weiner, therefore the other dinosaurs disliked him. It is now used on people we dislike, even if they don't have a big weiner.
You are a weinersaurus
That new guy is a smelly weinersaurus rex
If that weinersaurus talks to me one more time i will cry like a little schoolgirl
a female of the human persuasion hungry for the cock in any orifice of her body at all times.
Man, she is such a weinersaurus; all she does is talk about the cock.