Definitions by Sig Ma Chi

GDI 

"God Damn Independent" One who is not envolved in a greek organization. Typically engages in acts of douchebaggery, and envy all those who are greek.

Gelled hair Meatbags, Hippies, Goths,wannabe surfers and Nerds are all examples of GDI's

GDI by Sig Ma Chi April 15, 2008