What is Lao Er?
1.
Lao (third tone) and Er (fourth tone) in Mandarin Chinese has the literal definition of "old two", but used in the context of the Chinese language means either:
(1) A person's male manhood (slang)
(2) The second oldest in the family
Slang context, usually used amongst males: "My Lao Er is sore after that hottie last night"
Normal context, when a parent is introducing their son or daughter: "This is the Lao Er of my family"
See