What is the meaning of "هشت‌من‌نه‌شاهی" ?
What is the meaning of "هشت‌من‌نه‌شاهی" in the following sentence?

من یک مرد جدی هستم و با حرف‌های هشت‌من‌نه‌شاهی سر و کار ندارم

What is the meaning of "سر و کار ندارم" in the above sentence?

Question

What is the meaning of "هشت‌من‌نه‌شاهی" ?
What is the meaning of "هشت‌من‌نه‌شاهی" in the following sentence?

من یک مرد جدی هستم و با حرف‌های هشت‌من‌نه‌شاهی سر و کار ندارم

What is the meaning of "سر و کار ندارم" in the above sentence?

Answer

I can guess that هشت من شاهی represent  worthless things. but we don't use it much.
سروکار ندارم means I don't do that/ there is no relation between us/  it has nothing to do with...