Back Pocket Bookie. Share definition Flag 1. A woman who when wearing pants looks as though she has a book in her back pocket. White girls always have flat asses, every single one of them is a back pocket bookie. Back Pocket Bookie. by Sasophraso June 29, 2011 0 0 Get merch Get the Back Pocket Bookie. mug. Buy Now — $32.95 See more merch