你是二逼对不起橡皮
[nĭ shì èr bī duì bù qĭ xiàng pí]
The name literally translates to 'you are a loser / I'm sorry, eraser'. This could be a self-deprecating nickname implying that even the eraser would feel sorry for being associated with the owner's clumsiness or foolish behavior. The term 'sb' is slang and can be used as a derogatory expression. So, this online alias seems humorous, self-mocking and slightly crude.