be swarming Definition

swarm¹
noun

1. A large group of flying bees, led by a queen, that have left their hive in order to set up a new home.
2. Any large group of insects or other small creatures, especially ones that are on the move.
3. A crowd of people, especially one that is on the move or that is in chaos.

Thesaurus: throng, crowd, multitude, horde, pack, troop, drove, flock, host, multitude, myriad.

verb

intr
swarmed, swarming
1. To gather, move, go, etc in a swarm.

Thesaurus: congregate, crowd, mass, stream, throng, cluster, teem.

Derivative: swarming
adj, noun

Idiom: be swarming (be swarming with people, be swarming with things)

Said of a place: to be crowded or overrun.
Example: That pub is absolutely swarming every night

Etymology: Anglo-Saxon swearm.