An underground sexual fetish which involves one partner (the feeder) feeding the other, both to obtain sexual arousal and to encourage weight gain in the feedee. Feederism can vary in nature, from a consensual act between two people who mutually appreciate a larger body type, to non-consensual abuse, which may involve force-feeding and bondage and is undertaken with the intention of fattening up the feedee to the point of immobility and total dependence. The weight gained can also vary froma few pounds to hundreds, whilst some feeder relationships are not undertaken with the purpose of weight gain at all but for the enjoyment of food in an intimate context.

Most feedees are female (BBW or SSBBW) whilst the feeders tend to be FA males, although this is not the case, and gay/lesbian feeder relationships are not entirely unheard of.
Jamie is Debbie's feeder; she's gained 150 pounds since she met him... but she's aiming for 200.
by therealrichieedwards November 1, 2004
A sexual fetish where there is usually a feedee and a feeder. In a vanilla feederism relationship the feeder feeds the feedee in attempt to get them to gain weight. The feedee typically gains weight. An ssbbw or ssbhm is a good example of a feedee. There are also other ways in which feederism exists, in padding, stuffing, and inflation, and neighboring fetishes including vore, blueberry, and inflation. (again)
A:Whoa! Hayley got super fat over the summer.

B:of course, didn’t you hear she was into feederism?
by ClownDawg October 14, 2020
The action of getting off to feeding a fat bitch large amounts of food
Abdo: Bro Elyas saying it’s her personality but that nigga into feederism
Abid: What’s that
Abdo: Dude gets off to feeding fat bitches

Abid: Damn
by Shankaspear February 1, 2021
Usually a male who likes to encourage weight gain in his partner through the consumption of food. Feeders differ from FAs... whilst an FA is attracted to big girls, a feeder gets turned on by making a thin girl fat....or a big girl even bigger.
by therealrichieedwards December 11, 2004
A gay man who ejaculates into the mouth of his partner, expecting him to swallow the semen.
Joe is a feeder, John is an eater.
by John in Syr May 5, 2007

In a fellatio, this is the man who plays the passivele, that is, the sucked one.
The only thing Céline was interested was finding a feeder urgently.
by Tiago Zuhr July 24, 2008
Feeding fetishism: sexual gratification stemming from feeding oneself or a partner to 'obesity'!
Feederism, also feederist or 'food fetishist'.
by hammer---;, hytham May 4, 2007