"Dræv" is a Norwegian abbreviation for "ditt rævhøl", translated to english -you're an asshole/you look like an anus. This expression can be used as an insult, or some sort of nickname that you add to the end of a person's name.
"Du er så dræv/driv!" sa Jesse til Adam.
"You look like an anus!" Said Jesse to Adam.
"Grell" is the norwegian synonym to despicable or unseemly. It's a slang word used to describe people who has a toxic or repellent personality.
"Du er en jævlig grell lass, fyfaen!"
"You're such a fucking grell hobo, holy fuck!"