It is an entirely fictional disease that has been fabricated in the script of HBO's Emmy nominated show, "Curb Your Enthusiasm." Groat's Syndrome, also known as Groat's Disease, is a neurological disorder, marked by excessive hyperactivity and spasticity.
I disagree that it is a fictional disease, because I know many Americans that suffer from Groats and may not even know it.
I went to Arkansas once to visit my cousin and my cousin Robert said I bet you can't say "Fruit froat" five times in a row and I tried and I ended up saying "fruit fart" and he thought that was the funniest thing. I was funny the whole weekend as they had some sort of Arkansas plumbing and when someone went to the bathroom the turds would float down a cement channel to the creek, and we'd stand there and laugh. I then fell into that creek a few hours later when a rope broke. That's about all I remember from that trip.
I was in Arkansas again a few weeks ago on my way to and out of Louisiana.
Groat's Disease is serious business.