Billy Bookcasing Share definition Flag The act of laughing at a man so monotone that its hard to keep a straight face around him. Omg William Bor is so boring and monotone, hes definitely Billy Bookcasing. Billy Bookcasing by Not Keegan November 18, 2018 0 0 Get merch Get the Billy Bookcasing mug. Buy Now — $32.95 See more merch
