Ok... I have a question...
What in heavens name is Biggest Muffin Purveyor?
To expand on Prawnie's above explanation...
The biggest muffiner, "muffin" being the MC term for taking a thread off-topic in a fun, funny way. My favorite example of this is an old one, but in a thread discussing where the actual Muppet puppets are kept, once the question was answered, a whole bunch of members proceeded to plot and execute a mission to steal said Muppets, which ended up involving hijacking the Electric Mayhem bus, underground tunnels, and I think the kidnapping of some Muppeteers... loads of fun. It's a rather extreme example, but it's still my favorite.
So, the Biggest Muffin Purveyor is the member who takes the most threads in crazy, fun-filled directions, which around here tend to involve the throwing of muffins, penguins, and confetti, with the occasional water gun or punch bowl.
However! Muffining can also happen WITHIN a post. For example, if I proceed to ramble for a full paragraph in the middle of a post about how I got a concussion from a whiffle-ball in eighth grade, but get back on topic by the end of the post, that is a one-post muffin and can also contribute to someone's status as Biggest Muffin Purveyor.