jargon.artrocity.com
New Hacker's Dictionary the Jargon File v 4.4.6
[warez d00dz] “Leech mode” or “leech access” or (simply “leech” as in “You get leech”) is the access mode on a FTP site where one can download as many files as one wants, without having to upload. Leech mode is often promised on banner sites, but rarely obtained. See ratio site, banner site.