For those curious, I'd happily do a literal translation of a typical greeting between friends in Norther Norway, but I'm worried Twitter's shitty-ass machine learning implementation would permaban me.
"Hey, you deaf-blind moron. What's that horsecock-sucker been up to recently? Still as ugly as a haddock, I see."
Etc. etc. etc., especially if you're Sami or from one of the old fishing villages - though the Sami insults tend to be more subtle.
Comparisons with sea and river life are especially common, as are untranslatable up-to-four-word compounds referring to a person's particular absence of intellect, sophistication, manner or hygiene.
It's less impressive than it is in person, since half the idea is to tailor-make the insults to the particular person you're dealing with.
E.g. you'll be sure to make a lot of references to same-sex intercourse if you know the person you're addressing is just a tad homophobic.