嗜血笑颜傻本性
[shì xuè xiào yán shă bĕn xìng]
Translated as 'laughing in bloodlust with naive personality', likely indicating the individual has contradictory traits; being aggressive/enthusiastic about something but remains lighthearted, or appears silly on the surface yet hides an intense inner passion within. There could also be elements of irony, playfulness involved in such a username choice. Maybe just simply trying to convey an unpredictable aspect in his/her temperament through these words