a can of beer prepared for drinking in one gulp. (An opening is made in the bottom of a can of beer. The can, with the opening placed in the mouth, is turned upright, and the tab opener is pulled, releasing all the beer directly into the mouth. In another version, the beer is poured into a funnel attached to a plastic tube that leads to the drinker's mouth.) : A beerbong is a great way to liven up a party.
to drink beer as described in sense 1. : Those guys who were beerbonging all barfed after it was over.