Primarily used for greeting friends, "Dun" is also altered for added "coolness".
Yo, that movie was dunny-dun.
Why you bein' dun-dun?
This weed be dun, dunny.
particularly the Queens bridge housing projects
It is a distortion of the word "Son" and is used to reference a friend or someone whose name you do not know
ex 2- i want large fries with that dun
"Ayo dun, we bout to go down the road and handle buisnes"
"wassup dun" "safe dun"