noun
Familiar, affectionate term for an uncle or a middle-aged man, similar to おじちゃん but with a slightly more casual or childish feel. Often used by children or in informal settings.
See also: おじちゃん
おいちゃん、これ見て!
Hey uncle, look at this!
近所のおいちゃんがいつも飴をくれる。
The middle-aged man in the neighborhood always gives me candy.