Feeder Def:
This noob constantly finds himself in bad engagements like 3 v 1, and mismatches like QOT vs a Tower Rook getting Telly ganked, feeding the other team Gold used to upgrade thier tower/god making it harder for his team to win.
Telly Gank Def:
This happens to a player who attacks another player on a flag or tower and does not disengage when the teleport effect pops up leading his death as he is now engaged in a 2 v 1 on a tower.
Note this is common behavior of a Feeder... Don't be this guy
Feel free to add your own 