Kriff

Kriff was a fictional vulgar expletive in the Star Wars universe(don't worry, you can say it on this wiki, it's only bad in the Star Wars universe). Kriffting was a modified version based on the word "Kriff".

Behind the scenes
Since STAR WARS is child-friendly, Kriff doesn't need a real world translation. The words "kriff" or "kriffting" were used a number of times in the Dark Nest Trilogy of novels. Even Luke Skywalker used the word "kriffting" to refer to slicers when R2-D2 refused to let him see the contents of a protected memory area, and had gone so far as to damage himself. Luke had forgotten that his son, Ben Skywalker was present, and when Ben asked Luke what "kriffting" meant, Luke remarked that Ben's mother, Mara Jade Skywalker would not be pleased that Ben overheard Luke using that word. Captain Lon Shevu of the Galactic Alliance Guard used the word often when on raids, as well as Han Solo.