おじちゃん

uncle

おじ uncle + ちゃん affectionate or familiar diminutive honorific
noun Rare #36,123
uncle An affectionate, informal way to say “uncle”; children may also use it for a familiar adult man who is not a relative.
JA: おじちゃんに電話するね。
EN: I’ll call my uncle.

おじちゃん!

Uncle!

— High and Low (1963)

おじちゃんもおばちゃんも眠ってるよ

Uncle and Auntie are sleeping too.

— High and Low (1963)

子供の頃よく"おじちゃん"とまあご存知の人?

When I was a kid, I often called him “Uncle”—you know, someone we knew?

— パラサイト 半地下の家族 (2019)

おじちゃんが、お前にプレゼントだってよ。

Uncle says this is a present for you.