A type of animal who willfully betrays those who have been previously loyal to them. They are generally seen as nice on the outside (perhaps winning over their followers with the promise of gifts) but that is just a facade utilized to keep their loyalty. After the animal is done with their followers, they quickly ditch them for another group.
"Gretchen, stop trying to make zagfish happen, it's not going to happen."
"I wouldn't be friends with him, I've heard that he is supposedly a zagfish."
