Officially known as a Biologically slow person. This person is legally mentally challenged, and cannot be held responsible for his or her seemingly airheaded or bizarre actions. (For naturally slow, non-mentally challenged people, see jigs)
Teacher-"Class, what halogen on the periodic table is liquid at room temperature?"
The latter of the stage name used by the greatest rapper that ever lived, Christopher Wallace, aka, The Notorious B.I.G. It stood for Business Instead of Game, after his death it was known as Books Instead of Guns.