Short for the title of the "Bigs" series of Major League Baseball games, which has become one of the most versatile words of the english language. To Big or get Big etc. is to do any task in which you dominate or feel empowered by doing.
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)