Chacharoni is a play on words. Jjajang kind of sounds like ‘cha cha’ and the roni calls to noodles. There are other plays on words in the South Korean industry when it comes to jjajangmyeon. So basically what you have here is a thick noodle with a black bean sauce – also known as jjajang. Here’s a little about jjajangmyeon from Wikipedia –
