in reply to
Well, it's a long story. First of all, the name doen't mean a single thing. Once upon a day, I was about to go play Quake II online and I was in need of a new nickname. Suddenly, out of the blue, "[MUBA]Muppet" popped up. Again, it didn't mean anything, but it sounded ok to me so I adopted the name. Then I joined a clan (for the uninitiated: a group of players that operate together in clanwars, i.e. online team battles) and they forced me to get rid of the [MUBA] part. I became [QiT]Muppet but that was a rather annoying name, so I changed the Muppet part to MUBA: [QiT]MUBA and ever since, my nickname is MUBA.
Update: Replaced all occurences of [ and ] with [ and ]