萌哈哈萌兜兜
[méng hā hā méng dōu dōu]
This is a cute, childish-sounding nickname that conveys cuteness ("萌" - moe) and a light-hearted or fun-loving personality ('哈哈' – hahaha sounds). "兜兜" can be interpreted as small round purse but it also gives off the impression of something lovable or baby-like.