Top Definition
Condition in which online user develops spontaneous accelerated growth of the testicles causing irrational, aggressive behavior and resulting in posts written in all caps, bold face type, and/or multiple special characters (!).
Billy is a such a timid guy until he goes online and his cybernuts grow out of proportion to his actual nuts and he starts berrating everyone on the forum. Billy would never say this in real life of course, his cybernuts tend to grow huge underneath his keyboard.
by El Pinto Negro June 19, 2012

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