A large and heavy book, usually a Java or other programming language guide, that is used by an angry programmer to smack people over the head with while angry, or all the time.
Java-boy: "Hmmmm, I don't know what's wrong with my program."
Some Guy: "Cause you're a noob(see: n00b)."
Jaba-boy: "ARrrGRGGGWWFHDH!! I WILL SmITE YOU WITh My JavA BooK oF RaGE!!!"