A BitTorrent user who exits the program after downloading, thus preventing uploading to another user. However, the term "leecher" is any user in the process of downloading. See BitTorrent and bandwidth leech.
"BitTorrent leech." YourDictionary, n.d. Web. 17 August 2018. <http://www.yourdictionary.com/bittorrent-leech>.
BitTorrent leech. (n.d.). Retrieved August 17th, 2018, from http://www.yourdictionary.com/bittorrent-leech