What is a fanlisting?
A fanlisting is a place for all fans of a particular show, movie, actor/actress, singer, etc. to come together and build the biggest listing of people from all around the world who are fans of that subject - In this case the realtionship between Bam & Dunn. You can find out more about fanlistings by visiting thefanlistings.org.
And this fanlisting?
This list is for you to join if you're a fan of the real life relationship between Bam Margera and Ryan Dunn. They have been friends for years, and you might have picked up on how funny/cool/great/cute (etc.) they are together on Jackass, Viva La Bam, in the CKY movies or whatever else.