Top definition
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!"
by dyl-pod March 24, 2010
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