Someone who rejects logic and fact in exchange for faith in fairy tales, mythology, and misinformation; which they wrongly declare as truth. Normally a believer is a daft uneducated sheep who is incapable of processing information not spoon fed to them by a con artist in a cassock.
1. He said "I'm a believer," like it wasn't a merit badge to his stupidity.
2. The con artist (or priest as they are sometimes referred to), called upon his congregation of believers (otherwise known as air headed voids of intelligence ) to meet at the stadium and beg their invisible sky daddy for rain.