半清半纯半装B
[bàn qīng bàn chún bàn zhuāng b]
Mixing casual slang and seriousness, 'half clean-half innocent-half fake arrogant' shows self-derision mixed with some humor. People may use this type of nicknames because they don't want to seem overly serious, while also acknowledging their imperfections and tendency to put on airs sometimes.