Once upon a time, a guy named Vince had to buy a new computer because his old one was getting too shitty.  He asked his friend to piece one out for him and along with the computer came a free copy of Half Life 2.  Vince didn't even play HL2 for a while, but one day he tried it out and finished the game.  Afterwards he decided to try the online feature and so he loaded it up. 

At first he got pwn'ed left and right, but he kept at it and started to pwn other players.  He liked the sound it made when you got a "monster kill," so he decided to name himself Monster Vince.  After playing a while under that name he decided to try out new names.  Cookie Monster came to mind, but that was too gay.  Since Vince likes Nookie so much, the final name was decided to be Nookie Monster Vince.  Clever, yet funny... just like the Monster.