Noobeo is another term for noobs. It originated as a cereal designed to feed Noobs for a Low Low Price! Then some guy uses it as a name for playing counter-strike. Be warned! This guy is a NOOB.
Look! There's Noobeo! He is a Noob!
Man, I just ate a biiig bowl of Noobeos! I'm gonna play some Counter-Strike and take down everyone!