Alright, so it's pretty simple. Just tell us a story of where you got your username from, or any other usernames you might have, or even all of them ;]
My username Blupig was actually my sister's idea for a Runescape name for my friend back in I think 2002. He used it for a while, but then we ended up sharing the same "Blupig" Runescape account since he liked to play Runescape 2 and paid for a membership, and I liked to play RSC which had just become members only. I joined a couple RSC fansites afterwards, using the username Blupig so people knew who I was in-game as well. After that, it just kind of stick.
Though, recently, I've started to adopt other usernames since I kind of stole Blupig.
-Phenomenon (Something a little complex, cool, and nobody else uses it most of the time)
-KaXinSHan (Came to me in a dream, long story)
-xBlUx (Takes "blu" of Blupig and changes the cases around and adds 2 Xs on each end?)
Alright, now it's your turn, go for it