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1.
A greeting, slang for "what is happening"
"sappenin' ma n***a"
"Not much man."
by Clubb Soduh December 03, 2008
 
2.
Another way of saying what's happening?
Girl: "S'appenin'? What y'all doing?"

Guy: "Shit....chillin'"
by bluestripedtree February 20, 2007