BitTorrent is both the name of a peer-to-peer (P2P) file distribution client application and also the name of the file sharing protocol itself, both of which were created by programmer Bram Cohen. BitTorrent is designed to widely distribute large amounts of data without incurring the corresponding consumption in costly server and bandwidth resources. According to CacheLogic BitTorrent is responsible for 35% of all traffic on the internet.
The original BitTorrent application was written in Python and its source code has been released under the BitTorrent Open Source License (a modified version of the Jabber Open Source License), as of version 4.0. There are numerous compatible clients, written in a variety of languages and running on a variety of computing platforms.
I think it is when you go onto a site, and they sense what MP3s everyone on the site has. Then, you can use the site to download anyones MP3s.
It's kinda like you get it from the other person. But its kinda like you are stealing music too.
Or I could just be dead wrong.