dead loss
US /dɛd lɔs/
UK /dɛd lɔs/

1.
一無是處, 徹底失敗, 毫無用處
a person or thing that is completely useless or a failure
:
•
This old car is a complete dead loss; it keeps breaking down.
這輛舊車完全是一無是處;它總是出故障。
•
As a gardener, I'm a dead loss; all my plants die.
作為園丁,我完全是一無是處;我所有的植物都死了。