Spawned from the re-imaged "Battlestar Galactica" TV show - where a human-form cylon (of which there can be multiple copies) has their manufacturing line 'boxed' when they outlive their usefulness, or develop abnormal tendancies counter to their machine origins. This prevents cylon resurrection of that particular model.
Gangsta Jay: "Yo why you all up in my grill bitch?? You best quit that shit ... I'm gonna come down there and box your line fool!"