It's a silly word that last.fm uses to mean streaming metadata of all music you play to them so they can mine it and do all the crunching they do to run their service regardless of what player you use. A scrobbler can also refer to a plugin to some music player application that sends said metadata to last.fm.
Thanks for the explanation. In that case I will stick to winamp and my circa 2000 minidisc player, neither of which puke my playlist over the internet.
