Chodingtons' is a degenerative disease that can attack at any age. Those suffering from the illness appear to regress mentally, losing any and all trades/skills that they may have acquired during their life. In extreme cases language is also affected, as both the victim's vocabulary and ability to enunciate diminish rapidly.
The end result is a useless chunk of flesh and skin completely devoid of positive characteristics and rational thoughts. The person has become a useless chode.
Dave: "Is it just me, or is Wendell's code completely useless?"
Rob: "Wendell's everything is completely useless... Kid's got Chodingtons' Disease"