The appairant magical creature that comes to you when you are eighter high or wasted when you look porn.
It is said to look like Barney with sex toy strapt to a belt around his waist.
Friend 1: (Looking at toys) "Wow!" (Nearly Faints)
Friend 2: "What is it man"
Friend 1: " I just saw the Pornasaurus Rex man."
Friend 2: "Wow whats he like?"
Friend 1: "He's awesome!"