FLotW
In private bittorrent trackers, FLotW stands for Free Leech of the Week, namely a torrent you could download "freely" for one week, without risking getting a lower download ratio, and that you can keep seeding to boost your ratio.
Nice, I was one of the first to download the latest Ubuntu from a private tracker last night, and since it was FLotW, my ratio rose to the heavens! Now I can enjoy risk-free downloading of free, non-copyrighted material long into the future!