Used in martial arts to separate the kids from the grown-ups. A kid has a mon degree, a grown up (14 or above) has a kyu grade. A mon degree is white with a stripe of the colour while the kyu is fully coloured.
"Did you hear that Dean got 1kyu the other day?"
A person that only use one side of his headset, making it possible to actually hear what people around him is saying.
Chris: Heh, Gary sucks at CS
John: Shush, he can here you. He's only a half-gamer.