NN means No Name. A phrase commonly used in
online shooting games, especially
counterstrike, to describe or
insult others as unknown (unskilled) players.
###Noob was killed by Player1 with headshot from ak47###
Noob: You fuckn random nn, all you do is
spray like shit...
Player1: Sry im new to this
game.. but i think your a nn too
###Noob has left the
game###