What is Hella Happening?
1.
Could be used to say, It's really "happening", which in this case means it's really cool, it's off the hook, it's a lot of fun...just like hella cool would imply that it's really cool, hella happening could be used in a simillar context to mean pretty much the same thing...
That party was hella happening...(That party was hella cool)
See
