槑槑尛苯豬
[méi méi yuán bĕn zhū]
It combines childlike innocence ("méi méi", a term implying someone is very innocent or inexperienced), little ('尛') small or minor, '笨'(clumsy or stupid), and 'pig'(in Chinese culture pigs often mean chubby and cute sometimes). Together they create a playful self-deprecating username expressing adorably naive.