Ganjang gongjang gongjangjang eun duenjang gongjang gongjangjang yida
Soy sauce factory manager is soybean paste factory manager
Kwangsub told me that this is a traditional Korean tongue twister that he learned from a textbook in a Korean language class. But, he said that lots of people know and it and learn it just from word of mouth. According to him, its pretty much nonsensical; it has no meaning and is just supposed to confuse you.
To me it means absolutely nothing, even less than the tongue twisters that I know in English. I think its just meant for amusement for children. But, it does obviously incorporate things from Asia, soy sauce and soybean paste.