금테 둘렀냐? 금칠했냐?

금테 둘렀냐? Geum Te Dul leot Nya? 
금칠했냐? Geum Chil Hat Nya? 

Is it gilded? Is it gilded?
The expression "금테 둘렀냐? Geum Te Dul leot Nya? . 금칠했냐? Geum Chil Hat Nya?" is used when something is considered too precious and valuable, such as "Did you really paint the outside of it with gold paint?" or "Did you put a gold string around it?" It is also used to sarcastically talk about something that is considered too valuable,

and when the price is ridiculously expensive.

Do you have a golden string around your hand? 

넌 손에 금테를 둘렀냐?

A sarcastic expression for someone who is too frugal with their hands and does not use them.

Is this potato gilded? 이 감자는 금칠했냐? Geum Chil Hat Nya? 

Are you wearing a golden string around your mouth? Why do you only eat expensive things? 

"테 Te" is a noun that refers to a rope that is wrapped around something like a bowl to prevent it from getting distorted or broken, and is also used to refer to an object that surrounds it.