Can be used as an adjective or an exclamation. Dude awesome is also a philosophical idea, way of life, or oddly positive attitude that is about being a dude who is awesome and making it a priority to make sure that he/she is never an asshole. Dude awesome is the ultimate solution to any drama or issue involving human nature. Dude awesome is excellence.
dude 1 - "dude i totally passed gym class"
dude 2 - "dude awesome!"
the dude - "dude what do you think of this song?"
that other dude - "dude i think this song is pretty dude awesome! i love it!"