The useless busy work that your boss has you do when there is nothing else to do. This is the most shittiest, crap work that no one wants to do, but must be done. It applies to all fields of work including, but not limited to, Graphic Design (scanning, renaming files, masking images) Administration (data entry, booking flights, etc.), Mortician (embalming, cleaning the body, etc.)
Eric: What are you up to Johnny Boy?
John: Ahh man, I have shit load of k-work to do.
Andrea: So what are you doing today Caroll?
Caroll: Nothing but k-work. My boss has me changing one single date in thousands of excel sheets.