你是大众萌比我是大众逗比
[nĭ shì dà zhòng méng bĭ wŏ shì dà zhòng dòu bĭ]
This username plays on the idea of being 'cute' (萌, moe) versus being 'comical' (逗比). In Chinese net culture, "大众萌" means appealing widely to people through cuteness; while "大众逗比" refers to someone entertaining others by being silly. The phrase can be seen as humorous self-mockery or comparing oneself to others in a fun way.