There's A Perfectly Reasonable Explanation

This restaurant in South Korea has an odd slogan painted on the window. The word "die" on a diner will make you pause and reconsider, until you learn what it really means. Redditor pinqNoiz provided the explanation (censored by me).

둘이 먹다 하나가 죽어도 모른다.

Two people eat, one die, the other doesn't know.

It's a common Korean expression with mouthwatering food.

It means when two people are eating this dish, the other wouldn't notice if the other dropped dead because it's so ****ing good.

A few made up explanations are pretty good, too. I particularly like the legend. And then there's the pop culture tie-in. And the simple version makes a lot of sense, too.