My friend was Mr. Maeng, so his nickname was Maenggu.

My friend is Mr. Mang, so his nickname is Mangu.
My friend Mr. Mang was a famous person.
me on the phone
Hello, this is Myeong-gu’s friend 00. Do you have Myeong-gu?
When I do this, my mom
How old are you? I’m asking a question.
(Everyone, including my dad, is nicknamed Haenggu)
2021.04.11
How many countries have fallen?
Goo E Gyugugugugugugugugugugugugu.