Term used to express anguish or surprise. Can also be used to show disappointment. Turns out, it can also be used as a filler word.
(said while falling off a cliff) Shoooooodaaaaaaang...
Well shoodang, Sally, how you gon' tell me you slept with your cousin's dog? Shoodang.
Can be substituted for any noun to describe a person, place or thing.
Hey you left your Shoodang in my car last night