It's on the mouths of every kid in South Korea (or almost every). And you might have seen it on TV here.
I have seen it and I love sayin, "That's very hot!" to my kids. Makes a great connection. haha
Check it out and see why sometimes you got to love Korean silliness. This is a video of the Choco Boys who are a comedy sketch group that perform on TV and in front of a live audience.