My one is actually a serious gamertag too, lol. I'd like to have had a funny username, but I couldn't think of any. Besides, I think Angry Potato was taken.
Anyway, a Third Eye most commonly refers to a part in your brain or something (maybe I should have really studied it, lol) which is able to harness or manifest metaphysical powers and stufff. Like ESP, telekinesis, etc.
2012 comes from the fact that the Mayan calendar ends on this year. I'm pretty sure it ends on the 21st of December, and with the ending of this calendar, the apocalypse could roll around, or we could become higher beings that think in different ways, and we all advance as a race.
That's how my username come to be, lol.