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.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
Precedes or follows either a gratuitously disrespectful or honest remark, originated in New York City. Used in similar fashion to "no offense" or "to be honest," interchangeably.
Ya mans is wild buns, respectfully. Respectfully he's washed.
After school, The Modells on Jamaica Ave was active. Respectfully.