A person who can't stoplistening to Josh Groban sing. Mostly affects those known as Grobanites. Grobaholism has no cure. The only way to ease symptoms of irritability are playing his CD.
"Emily showed up to the party in bright clothing and thigh-boots, and a hat made out of tin foil, then when 'Paparazzi' came on she dropped everything and started freaking with the nearest guy!!"