扮cool
[bàn cool]
The term '扮cool' directly translates to 'play cool' or 'act cool.' Users who pick this as a username often express themselves as someone trying to be fashionable or hip. The word '扮 (ban)' means 'to play the role of, pretend to be,' so it can also have a bit of a humorous self-deprecating tone. In other words, the person acknowledges that they are not actually 'cool,' but are trying to be.