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adj. Being "high" on caffeine, to the point of incoherent annoying babbling and random hyperactivity and/or spacing out externally while mentally the mind is moving with incredible speed.
1. Man, after 10 XTZs I'm fucking gerked.

2. Hey dude, lay off the fucking Teas. You're gerked out of your mind right now.
by (L-CA) June 09, 2006