-Can be used as a greeting.
-Another way to say goodbye, correct, okay, sounds good, etc.
-The only words uttered between bros (must be yelled).
(Pretty much can be said to answer anything)
Brad: Oh a Sah Dude!
Me: Whats up Brad?
when some one is rleay high and is trying to say sup
aw sah dude im fucking high af right now