swarmy

adjective3

1. •
   Swarming with people or activity; teeming.

   • This market is the noisiest and swarmiest centre of noisy and swarming Florence, and I always like to pass through it on that account. — 1871
2. •
   (slang) Unscrupulous, sleazy, sneaky.
3. •
   Of bees: inclined to swarm.