Ko is a brand made in Australia. It is a small one-shop brand, but shows particular popularity amongst gehs or fargs.
However, the general public do not really know about this particular brand - usually causing commotion.
Therefore, this question is asked alot...
1: "Do you know Ko (brand)?"
Some people get confused and/or annoyed and will swear due to their frustration, so please be aware and cautious when using this example.