Seed( er)? Leech( er)? Peer? What are you talking about?
These words are BitTorrent terminology. A seed or seeder is a person who has a full copy of the content in this torrent. They are either the original distributor or someone who has completed the download and is just uploading. A leecher is a person who has begun downloading this torrent and does not have a full copy as of yet. Also referred to as a peer. A hit-and-runner is a leecher who completes the download, but doesn’t seed until they reach a ratio of 1.0. Of course, this is frowned upon. These hit-and-run users are often called leechers, as in the parasite, the blood-sucker that lives in the tropics. Although the same word is used as someone who hasn’t finished downloading, it is also used as a derogatory term.