When one takes a shit, puts in in a book so the said piece of shit is flattened between the pages, and replaced in the shelf of a classroom or library. Then, said book will be picked up by an unsuspecting person, and will open up and subsequently vomit on the Filthy Libro.
"Bahaha! That dude just opened up our Filthy Libro!"
by Sloppy Mountain September 16, 2009