Rigby legally changed his name to "Trash Boat" which caused his own friends to laugh at him. Even worse, he has become the whole town's laughingstock for it.
!! Tropes in this episode include:
* SetRightWhatOnceWentWrong: The Urge went back in time to the present to kill Rigby so that he can stop him from changing his name to "Trash Boat", despite the fact that he had already done it.
* SpaceWhaleAesop: Don't try to change your name, or else you'll steal a famous rock star's fame and his future self will try to kill you because of your new name.