What do you mean by chatting and playing LOL?

LOL means laughing loudly on most occasions, just like China's 2333, hahahaha.

LOL (also written as lol) is a common network language term, which refers to laughing out loud or laughing out loud, abbreviated. It was first popular in newsgroups, and then widely used in other computer-aided communication tools and even other media. There is also ROT FL (rolling on the ground with laughter, that is, rolling on the ground with laughter). In addition, LOL has other meanings that have nothing to do with laughter, but it is rarely used, such as "good luck".