What's going on? How are you doing? What's new with you? "Happening" is often colloquially shortened to "happenin'" or "happ'nin'." A: "Hey, Jake, what's happ'nin'?" B: "Not much, Mike. How you been?" What's happening, everyone? You all have a good weekend?
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.