What is "peacock lady"?
Native speaker’s answer
Rebecca
Great question. As you may know peacocks are a type of bird known for being very colorful and bright. So the phrase "peacock lady", is a comment on the fact that Blossoms costume is very colorful and bright. He is being sarcastic, saying that she wouldn't know anything about being scary because she's too bright and colorful, like a peacock. "Lady" is just a reference to the fact that she is a girl. This is not a phrase or expression that is used in conversation, it is simply something that the character says in this show.