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Restless Groove Syndrome, or RGS, is a disease suffered by 90% of americans and 75% of people world-wide.
Common symptoms include moving a body part in-beat with music that is currently being listened to, such as tapping of the foot or banging of the head.
There are no current cures for RGS.
Cool Kid One: Look at that metalhead! what's wrong with him, and why is he moving his head so rapidly!?!?

Cool Kid Two: It's apparent that he suffers from Restless Groove Syndrome.
by Harrison a. June 04, 2007
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