Little is known about the original recording behind Dorian you're terrible, so the clip circulates mainly as a short callout sound rather than a widely documented quote. Its appeal is the specific name paired with a very general insult, which makes it perfect for teasing anyone called Dorian and funny even when used out of context. Short reaction clips like this spread through soundboards, chats and edited videos because they can be dropped in instantly, understood immediately, and reused whenever someone does something impressively bad.