pile up

US /paɪl ʌp/
UK /paɪl ʌp/
"pile up" picture
1.

to accumulate or increase in quantity, especially to an unmanageable degree

:
•
The dirty dishes started to pile up in the sink.
•
Work tends to pile up when you're on vacation.
:
accumulateamasscollectgatherhoard
2.

to crash or collide, especially involving several vehicles

:
•
Several cars piled up on the icy road.
•
The accident caused traffic to pile up for miles.
:
crashcollidesmashwreck
:
pile-uppileon the up and upupup tocome up withfollow up