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1.
a word used to describe the dark side of facebook where people can basically stalk someone if they really wanted to.
"I don't want my pictures put on creepbook. Who knows who will see them?!"
af Courtney 101 8. november 2006
 
2.
Perusal of a facebook "friend's" photos in an effort to catch-up on their lives...usually because communication with that "friend" hasn't occurred for a substantial period of time.
"Have you talked to Catherine lately?"
"No but I creepbooked her photos and I think she's moving out of her apartment soon."
af Swampdonkey21 1. november 2009
 
3.
Looking at a person's Facebook profile in hopes that there is something arousing.
John loves Creepbook. He looks at Janes profile to find pictures to fap to.
af MrRstar 2. marts 2011