Taking a book out of someone's bookcase and preceeding to deficate (shit) between two of the pages and then placing it back on the shelf. A.K.A. "The Ultimate Bookmark."
"Jimmy Jillikers!!!" Harvey exclaimed as Otis paper back flaniganed his copy of "The Great Gatsby."
In texas hold em poker terms it means pocket Kings (2 kings). A king (any suit) is often called a cowboy and as we all know in the movie "Broke Back Mountain" two cowboys were together hence the poker name for pocket kings or two cowboys together.
If someone has a pocket ace and king its called a "Cowboy with a Bullet". If you have pocket or 2 kings, a better hand, then you would have "Broke Back Mountain".