It's a nonsense word. On their
variety show, Run BTS, the BTS members were
playing a game like telephone, where you have to read your teammates lips while wearing
headphones that are blasting music. J-Hope was trying to mouth the word "carbonara" to Jimin, who read the now infamous word, LACHIMOLALA, to the final player, Jin. Despite getting the wrong "message" Jin saved the day with his genius ways and got the right, answer, "carbonara," to everyone's surprise.