A person that has a lofted bed and has his desk placed underneath it, and likes to sit at his desk for exponentially long amounts of time, doing activities such as youtubing, masturbating, and/or stalking the "f-book"

ROOK KIDS AFRAID TO LEAVE HIS ROOK
Person 1 - yo is rook kid still chilling in his rook?
Person 2 - oh you mean erik scheffler?
Person 1 - yeah... his real names rook kid.
Person 2 - yeah rook kid never leaves his rook.
by rook kids #1 fan September 24, 2010
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