A person who plays music in a band or solo (most commonly Indie Rock or other hipster music) who has no or very little talent yet feels compelled to strut around or just generally act like a "Rock Star". Most commonly found in cities with "great music scenes" such as Austin or Seattle and simply revitalizes the idea of empty egotism over any substance. People who want to act like "Rock Stars" for the status symbol, but actually know very little about music itself. So therefore people with the exact same talent and delusional sense of self-importance that a person playing the video game "Guitar Hero" would feel.
I went to the show last night and it sucked, they were all just a bunch of Glorified Guitar Hero Players douche bags.