This condition was first named when fans of SHINee, known as Shawols, noticed that Onew kept making cute mistakes. At first they thought that it was very cute of Onew, but as time passed, they began to suspect that Onew was doing this for fanservice, and began to worry that he would hurt himself. His fellow members, Key and Jonghyun, have confirmed that this condition is real, and that Onew is not acting.
I hope that Onew won't hurt himself because of his Onew Condition.
This illness was developed by Lee Jinky, best known as Onew, leader of K-POP group SHINee, which provides this condition's name. Shawols, fans of SHINee, have been studying this particular illness over the years and haven't found the cure for this. However, SHINee members have found that you can ease this disease by singing "Molhaedo Onew Sangtae" (which means "Whatever he does, it's Onew condition") whenever the disease occurs.
SHINee: *awkward silence*
SHINee: "♫ Molhaedo Onew Sangtae ♪" (Whatever he does, it's Onew condition.)