待我发育成熟草翻你待我长发齐腰勒死你
[dài wŏ fā yù chéng shú căo fān nĭ dài wŏ zhăng fā qí yāo lè sĭ nĭ]
This name contains a humorous, exaggerated expression of revenge: when the user grows up (and presumably becomes more mature), they will metaphorically 'strangle' someone with their long hair or 'overthrow' someone. It uses an internet meme and colloquialisms to convey a playful but threatening intent, likely not meant to be taken literally.