From the Hangeul it seems that F.CUZ is suppose to be a play on Focus. I can see what they are trying to do, but maybe they should use a name that does not need to be explained. Better yet, maybe use something that is not Romanized as "Pokeojeu" and sound a lot more like Picachu, the animation character. =D
The really funny side, for me at least, is that Cuz, in South Africa, is short for Cousin, and is used like Dude, or Bro.
It means that to me it look like their name is a play on 'F***, Cuz!"
(F***, Dude!" , "Holy S***!" , "Oh My God!" and such)