Murk Share definition Flag Actually spelt 'Merc' but these idiots below me don't seem to realise that. Short for 'Mercenary' it means to destroy or to beat mercilessly 'Wow I murk'd him' 'Dude, it's merc'd, dumbass' Murk by Mizticall May 6, 2010 0 0 Get merch Get the Murk mug. Buy Now — $32.95 See more merch