library police Share definition Flag librarian and/or library aid(s) that follow you to your classes when you owe a 5 cent late fee Dan: Hey, do you have 5 cents? i need to get the library police off my butt library police by ♫sar-bear♫ December 9, 2008 0 0 Get merch Get the library police mug. Buy Now — $32.95 See more merch