creeposaurous 

a generally creepy person, one whom tends to weird others out on random occaisons.

I was sitting in the bathroom stall and this creeposaurous stood on the toilet next to me to ask what my favorite color is.
That creeposaurous snuck up behind me and then wouldn't stop smiling.

creeposaurous by bridgetmarie December 8, 2005

Creepasaurus Rex 

1. (n.) The innate animal instinct that comes out while we mindlessly use social networking sites, such as Facebook and Twitter, for hours on end.

2. (adj.) Being a really big creeper

John missed his favorite T.V. show last night because he was being creepasaurus rex on Facebook.

"Chester totally tried sneaking a peek at you at the urinal, what a creepasaurus rex!"

Creepasaurus Rex by dyl-pod April 4, 2010

Creeposaurus/creepasaurus rex 

These are alternate spellings/pronunciations to the already defined term "Creepersaurus rex". They refer to a very creepy person who exhibits monstrously creepy behavior that they remind you of a creepy dinosaur. The spellings and pronunciations may vary by person due to sociocultural, economic, geographical, and several other factors.

Person 1: That Facebook stalker was totally a creeposaurus. I got the heebie-jeebies!
Person 2: Me too! But, I personally say/spell it creepasaurus rex, but I'm glad we agree on something.
Person 1: Trueee. It does come from Creepersaurus rex, anyway...

Person 2: Creepo, creepa, creeper.... All of the describe this weird ass person!

Person 1: Yes, a Creeposaurus/creepasaurus rex indeed!

Creeposaurus/creepasaurus rex by LingDanc803 April 22, 2021

creepasaurus 

A creepy person

This guy won't stop calling me! He's such a creepasaurus!

creepasaurus by Christine and Kerry March 7, 2009

Creepysaurus 

An old man who likes girls young enough to be his granddaughter.

Hey little girl, I'm a friend of Barney's.
My name is Creepysaurus. You want some candy?

Creepysaurus by The Iron Butterfly April 15, 2011