pile-up
nounUK /ˈpaɪl ʌp/
US /ˈpaɪl ʌp/
A pile-up is when many cars crash into each other on the road.
The fog caused a big pile-up on the highway this morning.
OTHER MEANINGS
2. A large number of things gathered or stacked together in one place.
There was a pile-up of dirty dishes in the sink.
3. An accumulation of tasks, problems, or work that keeps growing.
A pile-up of homework made him stay up late.
4. In sports, a group of players falling on top of each other.
The players ended in a pile-up after chasing the ball.