This word's origins do infact come from quake 3 like a gentlemen from the first page mentioned. A player named O.G. coined the term. Furthermore it was not a typo error it was done intentionally. I know this because I am the very O.G. himself. Some may remember my handle, mostly played ctf4 on quake.oarie.net. I'm an unknown e-legend. LOL. I am also the one who coined the term "knee grow."