The word is most commonly used by the youth in Norway. It was originally a bastardisation of chill, but it saw the same evolution as ''motherfucker''. Which means the word can now stand for anything.
It is also normal to use the word in response to something said by Spirri.
Djole is like ur mouth/face, usually used in french montreal slang; when you tell someone "djole" it means to shut their mouth or to look at their face.