Looking for a fanfic...

Don't you just love those really vague requests? It was this story... about some guy...

Well. I'm looking for a Harry Potter fanfic. Um. It was really funny? It had something to do with a naked quidditch match. Or a naked quidditch calendar. Or both. And Fred and George were making novelty t-shirts or something calling Voldemort Moldymort. Strategic googling hasn't worked, and I can't remember enough details or where I saw it in the first place. Sound familiar to anyone?