Complex sentence: The Story is based on an outcast named Ricky Beamer who is made fun of by a group of bullies because of a girl named Tasha McLain, who made the "Ricky the Rat" nickname up.
Split into simpler sentences: The Story is based on an outcast named Ricky Beamer who is made fun of by a group of bullies because of a girl named Tasha McLain. Who made the "Ricky the Rat" nickname up.