Definitions

1. noun

a crowd that is standing or gathering at the top of an event or a venue, often waiting for the main act or performer to appear.

“The upcrowd erupted in cheers as the headlining artist took the stage.”

2. verb

to gather or accumulate at the top of an event or a venue, often in anticipation of the main act or performer.

“The fans began to upcrowd the stage as the opening act finished its set.”