What do Henan people mean by second-rate goods?

There is a meaning of calling others stupid, and there is also a meaning of describing lower IQ.

Er-goods is a Chinese word, also called "er" for short. Its original intention is to insult others and call them stupid. Er-goods is not only a curse, but also a very apt adjective, which is used to describe people with low IQ who always do stupid things. Due to the development of the Internet, the meaning of Er-goods is not only derogatory, but also used to describe people who are stupid and cute, and often make some cold jokes and things themselves, and it is more similar.