Medicine is the homonym of YO, Chek is the homonym of CHECK, and noise is the homonym of OUT. Together, Chek Nao is a transliteration of YO YO, have a look. The meaning of medicine and medicine can be understood as listening now, or as I'm going to start now, so you should listen carefully.
Cheknau comes from rap elements, and CHECK OUT is a common language in English rap, which can be regarded as a popular spoof style on the Internet. With the popularity of homophonic stalks, more and more people will use homophonic stalks in network communication. People who can understand it think it's ok and interesting, but for those who don't surf the Internet much, it may be on the same level as alien languages.