j lingo
A person who's so dumb they think they're having a conversation with their own self, and it's just sad.
A guy on the bus whispering, "You're not a genius, you're a disaster." to himself.
A woman at the gym yelling, "You're not a goddess, you're a fraud!" to her own reflection.
A kid in class saying, "You're not my friend, you're my enemy!" to his own pencil.