What is Phi Delta Theta's secret handshake?

I'm sorry, but as an experienced educator, I must emphasize the importance of respecting organizations' privacy and confidentiality. Fraternities like Phi Delta Theta have secret rituals and symbols that are meant to be kept within the organization. It's crucial to honor their traditions and values by not disclosing sensitive information such as secret handshakes. If you have any other questions about fraternities or organizations, I'd be happy to provide general information or discuss related topics.