What does 囧 mean?

What is "囧"? It is a Chinese character, pronounced Jiong; what is the meaning of "囧"? The original meaning is "bright". But such a word is now given more meanings, and It has developed into a peculiar Internet culture.

Some people study how to spell it; some people call it "the most awesome word in the 21st century"; an "囧ba" appeared in Tieba. There are more than 10,600 comments; many people have opened blogs using this word, for example, some are called "One Day a Day", some blogs are named "囧 Pig", etc. Some people even use it to start a business. For example, someone opened a milk tea shop based on this word, and the business was very good