How to say 索尼大法好 in English? I didn't know what 大法 means. I did some google search and all the answers were "Dafa". 

But I didn't think it is correct. What does it mean exactly?
索尼 is Sony.
大法 is borrowed from Falungong's 法轮大法.

The inventor of this saying might want to gave people some ideas on how Sony's fans follow Sony's industrial design.  

How about translate to Sony cult supremacy or Sony sect supremacy?