Originated in Azilda, "sup" can either mean "what's up" like the rest of the world uses it, but, it is also an emotional expression in itself. This expression can be used when you are surprised.
Friend: *sinks a halfcourt shot first try*
Me: "sup"
Friend: *misses a basketball shot when he's 2 feet away from the net*
Me: "sup"
Me: "sup"
Friend: *misses a basketball shot when he's 2 feet away from the net*
Me: "sup"
by onlyinazilda April 27, 2018
Get the supmug. by Pussy destroyer;) November 6, 2018
Get the Suppedmug. 
sayin whats up in a way you think you sound cool but you dont and actually sound like a middle schooler
by The rich bitch whos 9 June 20, 2022
Get the supmug. 
by WhyPqnda June 2, 2018
Get the Supmug.