blue box
noun
1
- chiefly US an electronic device used to access long-distance telephone lines illegally〈主美〉蓝盒子（一种盗用长途电话的电子装置）。
2
- chiefly Canadian a blue plastic box for the collection of recyclable household materials〈主加〉蓝色垃圾箱（用于收集可回收家用物品）。