A person, who for some weird reason, doesn't like Sylar. They usually have poorly thought out arguments for why Sylar isn't awesome, such as ridiculous claims that his eyebrows are ugly or that ZQ's acting is bad. However, quite a few of them haven't even seen Heroes, and don't like Sylar simply because the have friends in the Sarmy who are obsessed with him. Still others like other, less awesome Heroes characters, such as Peter or Claire, and get upset because Sylar constantly tries to kill them. Syhaters are suspected of having a severe mental disorder, and should be avoided at all costs.
Hey, I have a friend who is a Syhater. She hasn't even watched Heroes. I think its just because I talk about Sylar too much.