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The act of smoking a lot of marijuana from a bong. Usually a group activity.
We're chilling at Greg's later, come bong out with us.

We bonged out in Trevor's living room.
by good_memoryz January 07, 2011
When a bong is continuously passed around in a circle 'til someone turns it down cause they just can't smoke anymore refer.
"Ahhhhh!!! Ha! Ha! - Tracy bonged out!"

"Let's go to the tree house and bong out."
by Nicole Berger May 03, 2008