Attention Deficit Disorder, most frequently diagnosed in kids. It's something that can easily be "self diagnosed" in a pseudo science way, but it is something that everyone on the internet seems to have an opinion on, whether they are a doctor or not.
Asshole 1:"ADD is just a sorry excuse for people to be lazy! Believe me, I know!"
Asshole 2:"ADD is a real thing, a doctor can diagnose you for it! I know a guy!"