surging crowd; wave of people
Describes a large, moving mass of people, often in a public place or event. Can imply a dense, flowing crowd like a wave.
The area in front of the station was crowded with a surging wave of commuters.
I was pushed by the wave of people at the festival and almost got separated.
A surging crowd of people flooded the area in front of the station.
He pushed his way through the crowd and moved forward.
The child was swallowed up by the crowd at the festival grounds.
This shopping street sees an unbroken flow of people even on holidays.