装逼遭雷劈装纯遭人日
[zhuāng bī zāo léi pī zhuāng chún zāo rén rì]
This username is composed of very colloquial phrases. '装逼遭雷劈' refers to getting punished (as dramatically as being struck by lightning) for being overly showy or arrogant. '装纯遭人日' implies being exploited or losing one's innocence for pretending to be pure or innocent. This kind of nickname is more likely to be used humorously or sarcastically.