An anti-fan is someone who doesn't like a particular person, team or thing, and always criticizes or speaks negatively about them. Have you ever seen someone who is always talking bad about someone else or doesn't want to be friends with someone, just because they don't like them? That's what an anti-fan does. They don't have anything good to say about that person or thing and always find faults in them. It's important to remember that everyone has their own preferences and it's okay if someone doesn't like the same things as you do. But being an anti-fan by always hating on someone or something is not cool, and we should try to be respectful of others even if we don't agree with them.