我乃小多多大人是也我家有个小多多大人
[wŏ năi xiăo duō duō dà rén shì yĕ wŏ jiā yŏu gè xiăo duō duō dà rén]
This online name implies a humorous self-declaration. The user is likely expressing in an exaggerated manner to appear like a little big person (‘small Dudu master’) and emphasizes this identity playfully by mentioning owning another such person, creating a cute or endearing tone with a hint of irony.