What does the fortune teller mean by having a big brother?

It is impossible to determine the specific meaning and significance of "having a big brother" in fortune telling.

In China culture, fortune telling has a long history and cultural tradition. Different fortune tellers and methods may have different predictions and explanations, and some special terms and argots may need to be combined with specific backgrounds and situations to understand.

Fortune-telling is just a folk tradition of China traditional culture, which lacks scientific basis and should be treated rationally. Don't trust fortune-telling results and give up your judgment and subjective initiative.