A Feedee is someone who enjoys the idea or act of growing bigger or fatter. Often they are the recipient of the action done by their partner, the "feeder." In the gay community, feedees are often referred to as "gainers."
As a sexual orientation, it is a natural extension for BBWs, SSBBWs and FAs. Many feedees and feeders experience sexual gratification and a romantic bond through feeding fantasies and/or actions. Feedism (or feederism) and gaining is, in many cases, the focus of web models, with eating and stuffing videos followed by videos celebrating higher and higher weigh-ins.
Old websites on the early internet had sections devoted to the fledgling idea of feedism, such as Betsy's "Feeding Fantasies" movie and "The Weight Room" on Dimensions Magazine's website, or entire websites, such as Feeders.co.uk.
Today, websites and apps specific for meeting other feedees/feeders and discussing feedism topics are much more common.
Popular sites include: