Billy Box
When the boss is tired of your bad attitude, lack of production, or general goofing off, it is the box used to placed your personal work items into so that you can make only one trip out the door when you leave the buidling.

The name comes from a car sales person named Billy who would have an argument with the general manager and storm off to the parts department to find a box to put his stuff into. The sales manager would go talk and attempt to cool the sales person down and to prevent him from leaving.
"If you do not like working here, just go to the parts department, get yourself a "Billy Box" for your $#@! and hit the bricks seeking other career opportunities."