It is another way of getting another chatter to talk to you, but it is considered to be rude unless you have no choice to, which is usually when no matter what you have said in the chat, everyone is still ignoring you even though you have not typed anything rude or insulting.
Chat Abbreviations To cut down time on typing, many people have started using abbreviations for various actions and phrases.
If that doesn't work usually it's best to address someone with a question.
For example, to ask someone a question you may want to use this format to do it and to talk to others the same way: Person's name: Your question Most of the time you will get someone's attention this way.
Many of the abbreviations used in chats have pretty much become universal and a lot have become creatively humorous thanks to many regulars in those chat rooms.