6 is a popular online term. The digital simplification language that has become popular in the LOL game is the homophonic number of the spoken word "slip". The interpretation of slip is probably slippery, but in spoken language, it is the proficiency of expressing a thing. For example, your Chinese is very slippery, meaning that you speak Chinese very well. You play cards very slippery, meaning You play cards very well, you are very familiar with the card hero. Similarly, your study is very slippery, meaning that your academic performance is very good.