for the noob in the room could you please explain what Feeding is?
"Feeding" is a term taken from DoTA. What it refers to is argued over, but everyone understands the basic concept. I like the example of a vampire feeding and becoming stronger best.
Basically, it means giving the opponent "free" xp and gold. Typically, it was when highly skilled players picked out the newer or terrible players in a match and specifically preyed on them. Thus they could "feed" and gain power quickly, as more familar players would carefully watch their health and the location of all heroes so as not to give xp and gold to another demigod without good reason (usually standing their ground to fight and losing rather than being ambushed).
The term grew to basically mean whenever someone gained the most kills in a match, through preying on less skilled players or simply by being good, and quickly jumping up levels and grades of items. After feeding, a character is normally too powerful to stop, resulting in more feeding until the game is basically decided.
Normally someone being fed is much higher than anyone else in the game as feeding can't be split among team mates. If you work together, it's technically not feeding.
In demigod it's not as easy to be fed, but generally when large, easily avoidable mistakes result in you constantly getting kills, you're being fed. I'll give you an example from my UB, the TB I was playing was walking around capping flags with 40~ hp (I know it was below 50 as the initial 50 damage of my spit killed him.) After killing him many times in a similar manner, not because I was good but because he made terrible mistakes such as over chasing or walking around with no hp or mana, I was level 12 while everyone else was 6 or below.
From then on, as you can tell, it was pretty easy to keep feeding. Nothing gives you as much gold or xp as a demigod, so I was also rolling in gold which gave me many great items far earlier than I should of gotten them. At this point it doesn't matter if someone else on their team is an elite player, I > him simply because I was fed and now I'm not only twice his level, I have better gear than he would normally have at this level.
That is feeding.