三分蛇精七分脑残
[sān fēn shé jīng qī fēn năo cán]
This username '三分蛇精七分脑残' (San Fen She Jing Qi Fen Nao Can) translates to 'three parts demon, seven parts silly'. It humorously implies someone who is mostly silly but with a touch of cleverness or mischief. The term ‘snake demon’ (蛇精) comes from folklore, and this phrase is used in modern contexts for playful self-deprecation.