What is Oh Man?
1.
An expression used to convey the instinctive reaction to a stimulus, be it a physical object or an abstract thought.
The nature of the reaction conveyed can be discerned from a combination of the context in which the 'oh man' was delivered and the intonation with which the 'oh man' was delivered.
Oh man...
Oh MAN!
Oh man?
Oh man, what IS that thing?
I just look took one look at her bearded face and thought 'oh man'.
2.
Often used for either conversation fillers or "oh fuck" statements.
Oh man, that dog took a crap on my shoe
3.
excitted, happy or surprised about somthing
Oh man check out the fellas over there
