Lean meat (Because it has no fat)
Explanation&Learning Korean
This is a play on words in Korean, where “살코기” (sal-kogi) means “lean meat” or meat without fat. The joke is that Seoul, being a major city, is metaphorically ‘lean’ or without ‘fat’ (excess or waste), implying efficiency and modernity. So, the meat ‘produced’ in Seoul is humorously described as ‘lean meat’. It’s a typical example of a dad joke that plays on words and cultural context for humor.