香蕉香蕉芭呐呐橘子橘子哦润着
[xiāng jiāo xiāng jiāo bā nà nà jú zi jú zi é rùn zhe]
It's probably composed whimsically or just some gibberish string that the person thinks it cute to put various fruits together. There isn't much deeper meaning conveyed by this kind of usernames - people just feel fun with them sometimes.