A "true" fan is one that doesn't shake or wobble when used on high speed, and evenly distributes airflow throughout the room.
Oh, my bad...wrong type of fan.
In my opinion, a true fan is the one who wakes up on Sunday, win, lose, or draw, and still has the passion, the love, and the respect for their program to come back to sites like this, or meet his buddies at the coffee shop, or go to work on Monday morning, and debate topics such as head coaches and O coordinators, etc.