Ko-Shut up

"Ko-Shut up" (코-샤탚) is a classic line made by Hui Yi during Korean Class.

Origin
It originated in Korean Class, when everyone was asked to read out the words shown in the screen (in Korean of course) At one point, the screen showed a photo of a nose with korean words that read "Ko". Hui Yi then says "Ko" pretty loudly and in a split second, turns to Jana and points at her to say, "Shut up". Hui Yi's execution was so quick and precise, that Jana was not able to react or comprehend what was going on until she realizes the nose on the screen 5 seconds later.

This resulted to the golden ritual, which is shouting "Ko-Shut up" while pointing at the person you're shouting it to.