(n): An individual, incapable through diminished capacity, to hear conversational tones outside of his/her own voice's auditory frequencies, thereby inhibiting ability to learn, progress, or communicate effectively with/from others.
1. A fucking retard.
2. One who lacks the social graces given to even the most rudimentary of mossy vegitation.
3. One who has lost all sense of reality whilst performing even the most menial of tasks.