Way back when GoldenEye 007 came out, Jonathan, David, Matt and some friends were in Jonathan and David's attic room at their house. They had just rented/bought GoldenEye for N64 and were going to play a round of multiplayer. Everyone picked characters and Matt was still trying to decide. Not having seen the movie yet, Matt picked Ouromov, and attempted to say his name, but failing and devolving into mumbling. Arumfrumfrumph was born!
Henceforth, Matt used Ouromov in every game of GoldenEye multiplayer since. Matt spread the joke to Sean and other friends, and the legend continued.