What sayings or things do you think artist have dropped the ball on patenting or Trademarking? I will start this list off.
Eminem - The term Stan, to describe an overzealous fan.
Birdman - The saying Bling Bling. (Do you really think he would have let BG or Wayne patent it?)
Drake - YOLO, There has been hoopla about T Shirts being sold with that motto on it.
Anything else Artist or Executives missed out on?