Why is Eun Ji-won called Lord Yoon? Does he have any other aliases? Why?

Honored him as "Your Excellency", on the one hand, because of his once unknown background (the grandfather of the former President of South Korea and his aunt who is still in the Korean political arena), and more because of his leadership temperament in the crystal age, there is also a nickname "Yin pupil", which was nicknamed by those members in the two-day and one-night program, and now it is already screaming. Because he is sometimes simple and sometimes naive, he asked some questions of primary school students, and everyone called him a joke.