Question: what zz mean in lol?
Answer: When trying to convey laughter in a virtual setting in Hangul, people simply spam this character, and just like rawnoodles said, ㅋ is on the same place as the "z" key on a Korean keyboard. It's supposed to represent laughter, nothing else. ... For the korean keyboard, saying 'ㅋ' is our equivalent of 'lol'.