哥不叼m姐不拽x
[gē bù diāo m jiĕ bù zhuài x]
This net name is likely intended to play on words in a casual, slang style typical among young people. 'Gēbùdiāo... Jiěbúzhuài' would translate very roughly as 'Brother doesn’t act cool, sister doesn't act aloof', where the letters m and x are often used humorously as substitutes to create playful variations on common slang terms, making the whole term a fun phrase signaling modesty or anti-coolness.