I don't know how to speak Norwegian, but according to the subtitles, the English translation is:
We found a fucking alien! Cheers!
By slightly altering the dialogue to "We have found a fucking alien!", we get a Norwegian translation of:
Vi har funnet en jævla utlending! Skål!
As I said, I don't know how to speak Norwegian, but this is very similar to what I think I hear in the clip. I'm not sure about the word "utlending" - it could also be "utenomjordisk" or "romvesen".