empties bags means in slang: Large garbage bags, which are usually found in the corner of a party. These bags can be filled with “empties”, such as majorska jugs and busch light containers. Once the empty bags are full, the party members will take off down side roads and toss the bags into the air. This is followed usually by someone shouting “Bink!” or “I ain’t going back to jail”. The next day, the bag-throwers will return to the scene and look at the cans and jugs scattered across the street. They’ll also laugh. (in Slang Dictionary, added by Lilian Reynolds)