Aesthetic bullying is when you say "Poison is the greatest metal band of all time. Anyone who doesn't agree just doesn't know what they're talking about." "Aesthetic bullying" and that particular example are relatively nice versions of a phenomenon that can affect any kind of values. You offer no argument for your opinion, you just forcefully state it in an intimidating way. It is taken to be, and sometimes is, an effective way of getting people to agree with you, but it has no connection to ultimate validity, just your projection of psychological force.