卡忙北鼻
[kă máng bĕi bí]
This internet name is a combination of cutesy and playful terms. 'Ka' in this context doesn't have a special meaning, while 'Mang' suggests someone is very busy or chaotic ('busy' in Chinese pinyin sounds like mang2). 'Beibi' translates to baby, often used affectionately to describe cuteness or naivety.