"Infinite Challenge" guest Lee Joon proved himself to be the Kim Jong Min of idols, sending viewers around the country laughing.

On Saturday's episode of MBC's "Infinite Challenge," the cast was playing a speed charade and Lee Joon had to explain the word "Moratorium."

He yelled "Boradori," the name of the purple Teletubby in Korean. He added, "He wants to wear a hat.. Moja Boradori."

When he was trying to explain a saying, he said parts of the phrase in a panic, to the amazement and laughter of the rest of the cast.

Lee Joon was not too shy to be himself in front of much older singers and comedians and proved himself as the Kim Jong Min of idols. 

This episode of "Infinite Challenge" is themed as Muhan University, with guests like Lee Na Young, Lee Tae Sung, Defcon and MBLAQ's Lee Jun.