swarm with (someone or something)
To be filled or covered with a huge number of people or things. I nearly died of fright to discover our trashcan was swarming with cockroaches. The beaches in this town are swarming with people in the summer, so it's actually nicer to be here in the offseason.
swarm with someone or something
to be abundant or crowded with moving people or things. The playground was swarming with children, and I couldn't find my own. The picnic blanket swarmed with ants.
To be full of some things or some people; abound or teem with some things or some people: The rotten log swarmed with insects. The courtroom is swarming with reporters.