dead weight 固定负载，拖油瓶，累赘

You've been dead weight this entire trip. You've just sat there without driving or paying for gas or anything!

整个旅行你就是个拖油瓶！就知道坐在那，既不开车，也不付油钱，啥也不干！

Those empty boxes are dead weight. Let's get rid of them.

那些空盒子完全就是累赘，扔了吧。