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3.
OGL
Short for the Open Gaming License, a competently written open license (compare to the GPL, an incompetently written license). The most famous game that has been released under the OGL includes d20 (the system that runs the Dungeons & Dragons, Star Wars, and Call of Cthulhu role-playing games), although there are a few other minor games also released under this license.
If it says OGL on the cover, it means it was written for d20 but they can't say that, wink wink, nudge nudge.
by Shanya Almafeta April 16, 2004
 
2.
ogl
Stands for Online Gaming League. Commonly used in online gaming for someone or something that is easy or lacking potential.
Online Gamer 1: LOL this guy is ogl! Look at his score! 1 kill and 18 deaths!

Online Gamer 2: Yeah. His one kill was on an AFK.
by Exititum crux January 01, 2007
 
4.
OGL
A league asshats play in.
Asshat: I'm an asshat, therefore my particpation in OGL. Man, I'm such an asshat.
by Shadow X October 26, 2003