Top Definition
a prepositional phrase used to describe time spent on Facebook. Used to replace saying "on Facebook", often said after making a stalkerish reference to something seen on Facebook.
"I was lurkin' on da book last night and found a picture of my ex making out with a fish."

Girl 1: I wonder if that guy from Chem is available...
Girl 2: He is. He just broke up with Sherry who is in nursing school.
Girl 1: How do you know that...?
Girl 2: What? It was on da book.
by lurkin n' bookin' March 18, 2009
6 Words related to On Da Book

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