DRAMA-SAR-US Rex, noun; A creature you thought was extinct after your last relationship, you have yet again unearthed another example of this terrifying creature. Prone to argue about anything, create trouble out of nothing and never ever under any circumstance admit they are wrong!
Also see drama queen.
"My girlfriend is such a Dramasaurus Rex, I need to bail out now!"
"Did you hear her at the party the other night? Such a Dramasaurus Rex!"