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1.
-noun. (dun-sun)
1) a buddy, pal, comrade, homey, or friend.
1) What's up dunson?
2) Yo dunson, what's good?
by junjafak February 11, 2008
 
2.
Originally rooted from the word "dun", meaning "son", dun son is an extension of it's root. Usually in reference to entering or exiting, never used during conversation. A Greeting.
"Yo whas da deal dun son?" or "Yo I'ma holla at you lata dun son"
by Anthony "Klasik" Jefferson June 23, 2006