train wreck

train wreck or train·wreck [trein-rek] noun

1. an accident in which a train or trains are severely damaged.
2. Slang. a person who has experienced a personal failure, disaster, etc.
3. Slang. a disastrous situation, occurrence, or process: His football career has been a train wreck.

British Dictionary definitions for train wreck train wreck noun

1. an incident in which a train is severely damaged
2. informal something or someone that has suffered ruin or calamity