a plastic sheath for holding pens in a pocket, protecting the cloth from ink stains(This is a classic symbol of a nerd.)
by Light Joker February 23, 2005
An overly stuffed backpack nerds bring with them to school and/or the library. Usually filled with nerd items like a laptop, notebook binder, pencils, a few different calculaters, glasses case/cleaner and extra pair of underwear.
by The Roachman October 09, 2011