Mister Man

Proper noun

informal

(informal) Used to address a male, especially one whose name is not known to the speaker.

Japanese Meaning

男性に対して名前が分からない場合や相手の名前を知らずに呼びかける際に、非公式な言い方として用いられる呼称。

Mister Man, could you help me reach that book on the top shelf?

ちょっと、そこのお兄さん、上の棚の本を取るのを手伝ってくれますか？

Sense（1）

(informal) Used to address a male, especially one whose name is not known to the speaker.

As for you, little mister man, just look at the berth you've got!