Abbrevation for "Det Klikker For Meg", which means somethinglike "I am snapping" or "I can`t take it" in norwegian. Normally used in a stressfull situation.
It's an abbrevation for "Kill Fetch Deliver" and used to describe computer games with linear questing and hack and slash, but can also be used to describe plots in movies and/or books.
The abbrevation is slightly negative, but in a sense in the same category as FPS (First Person Shooter).