It is not a real word, but it is what the famous K-pop boyband member Jimin, heard instead of Carbonara in an episode of Run BTS. It has remained a fan favourite since then
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.