半俗半雅半疯癫

This could mean the individual feels caught between being down-to-earth ('vulgar') and sophisticated ('elegant'), with touches of eccentricity ('insanity'), possibly referring to a unique personality trait that combines different styles into a mixed style of character. In China’s web world usage context, it can describe people who behave freely, not constrained by conventional rules and norms in social scenarios, yet still maintaining certain levels of decorum and propriety within themselves as well.