Someone who looks at porn with every chance they get no matter where they are.
Kid 1- Did you hear about that kid who got busted for looking at porn on the teachers computer?
Kid 2- Oh you mean that stupid ass pornasaurus?
by leftyhandz November 6, 2009
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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!"
by Little Shadow Lurker August 4, 2010
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