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An adjective used to describe nouns, either proper or not, that are, by definition, creeptastic. Usually used in such a way as to describe things that are socially or visually creepy.
"That guy freaked me out, staring at me with all that creeptasticness!"

"Ugh, that dress just screams creeptasticness."

"Oooh, look, it's Creepy McCreeper in all his creeptasticness!"
by Thorne Thornton August 29, 2011
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