Often referred to as ftwr or "the rabbit", it is a small UK BitTorrent tracker carrying general 0-day content and a very sought after but unremarkable Gay Porn category. Part of the BitTorrent secret "elite" tracker culture.
"Aw, the rarest of trackers, would give anything to get an invite!"
"Don't mention follow the white rabbit or their URL, it's forbideen! Use F*** instead or you'll be banned."
"Closet gays found a safe haven in the 'rabbit' tracker."