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A mild form of hyperthyroidism (likely caused by down-regulation of T3 receptors in the brain and hence, high thyroxine tolerance and subsequent increased TRH and TSH) that doesn't harm metabolism or cause damage to peripheral organ systems, but however causes the the affected individual to display high cold tolerance, twitching, irritability, slight mental challenge, hyperactive disorder and other effects which have not yet been fully researched.

(Not fully proven, but research is currently being conducted to confirm the impact of David Syndrome on mental development. It is believed that it causes damage to the central nervous system, particularly the basal ganglia, thus leading to do symptoms resembling Tourette's with an early onset in life and a late onset of Alzheimer's, dementia and Parkinson's)
Bystander: Why is that weird twitching guy being such a dick?
Doctor: Please forgive him, he's just suffering from David syndrome.
by gay, pantyman, May 17, 2016
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