What is the meaning of Shanwei dialect for pot-headed pig?

Pot-headed pig means stupid in Shanwei dialect.

Shanwei dialect, also known as Minnan dialect, is said to have originated in the Luoshui Valley of the Yellow River, moved to southern Fujian in the Western Jin, Tang and Northern Song Dynasties, and originated in Quanzhou, Fujian.

Now it is mainly distributed in southern Fujian and Taiwan Province Province, but also widely distributed in northeastern Fujian, southeastern Zhejiang and most Chinese communities in eastern Guangdong, western Guangdong, Hainan Island and Southeast Asia. There are more than 70 million people who use Minnan in the world.