Definitions by pro urban
Backpack
A portable bag worn on your back. You can store multiple things inside of it. There is no sexual definition. What were you expecting?
Book Fair
That one thing that schools do where nobody actually gets books, and everyone just gets a UV pen or something like that because usually all the books they have are shit.
Person 1: Hey dude what did you get at the book fair, I got an eraser that looks like a phone.
Person 2: Nice, I got a UV pen!
Person 2: Nice, I got a UV pen!