A user of the Knoppix desktop environment. Or KDE kfolk are common on linux and are considering noblemen in comparison to gnomes. Which are stuck with gnome.
Kfolk come about when a hot busty, blonde woman has rampant sex with the linux kernel.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).