knumpty
An alternative spelling of numpty, the hard sound of the "k" hanging in there as numpty is often preceded by "fucking", but sometimes a swear word is inappropriate, so a silent swear is suggested by a silent "k".
Addressing BBC News 24 management, "You are a bunch of ... knumpties".
Head of BBC News, "You are a King Knumpty"; "How long does it take you knumpties to sort out the sound?"
Addressing journalists, "Recommended? To have an extra cheeseburger everyday! You people are complete and utter knumpties. The SACN report doesn't says that. Pricks."