You mean slang and words of a dialect for a certain region/city right?
What I find so funny about slang or specific words for a region is that you don’t always realize it’s not a normal word until someone goes “what does that word mean?”
Anyway some Dutch slang I hear quite a lot: Aso (from the word asociaal) : someone who does something antisocial or a situation that is antisocial.
when you see a car parked diagonally over 2 parking lots so you can’t park yours you can say “that’s so aso”
when someone is cheating in a waiting line people sometimes say; “don’t do so aso”/ “don’t be so aso”
(h)allee ( not even sure how i should write it ) It’s multifunctional. My younger brother uses it to greet people when visiting a party like a “hi everyone”, to say bye when leaving or on the phone, and also like “I’m back home”