Møgsvin (filth-pig), used as an insult similar to "asshole" or for someone who is literally filthy or messy.
Ikke den hurtigste knallert på havnen (not the fastest moped on the docks), used to describe someone who is stupid.
Pis mig i øret (piss in my ear), similar meaning as "fuck off".
Svagpisser (weak-pisser), for someone who is squeamish.
Pikhud på fingrene (cock-skin on your fingers), for someone who is squeamish about manual labour or about touching hot objects.
Skidespræller (shitkicker), someone who is annoying and unserious.
Bonderøv (peasant-ass), someone who comes off as rural or in a more broader sense someone who is uncool or uncultured.
Klaphat (clap hat), synonyms with idiot. Refers to a type of hat worn by football fans in the 1980's featuring a pair of stuffed hands that will clap together when the weather pulls a string.