(God Damn Independent). A college student who is not an active or a pledge to a particular sorority or fraternity. The GDI has either chosen to not affiliate with the greeks or maybe rushed and did not pledge. GDI's tend to have a reputation of being dorm rats but some GDIs are cool and have some greek friends. Just depends on the particular GDI. Being titled a GDI should not judge who someone is, its just a decision.