一梦醉千城
[yī mèng zuì qiān chéng]
The phrase can be interpreted as 'A Dream Drunken in Thousand Cities.' It's a poetic expression, suggesting traveling and dreaming across various places, or an unforgettable travel memory that made one deeply moved and almost 'drunk'. This kind of internet user names express a dreamlike state, with lots of romanticism and idealistic imagination.