Nickname Eminem and his, now deceased, best friend Proof gave to each other. Eminem speaks about this in a sad song written for Proof named Difficult.
"Dudey" – that's what we'd call each other
I don't know where it came from, but it just stuck with us
We was always brothers
Never thought about each other's skin colors
another way of referring to a friend. A derivitive of dude. Used by a small amount of people on the North Shore of Sydney Australia.
Also dudle (pronounced doodle)