待我长发及腰甩头发抽死你
[dài wŏ zhăng fā jí yāo shuăi tóu fā chōu sĭ nĭ]
'When my hair grows down to my waist, I'll flick it and knock you dead' combines playfulness with a hint of menace. This user likely uses hyperbole to convey frustration or humor in an exaggerated manner.