OMKV stands for Odu Maire Kandam Vazhi (which is a phrase in Malayalam Language). Literally means, "Get Lost you mutherfucker". Coined by a facebook group( Fan Fight Club FFC™ ) admin named Ashwanth Kok who is a well known motherfucking memelord and shitposting nigguh from Kerala.
"Hey, how you doin'?
"OMKV"
(can be used whenever and wherever as an answer to all sort of fucking annoying questions)
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).