buzzer

noun6

1. •
   a small machine that makes a loud rough sound as a signal, for example at a door

   • If you think you know the answer to the question, hit the buzzer as fast as you can.
2. •
   One who, or that which, buzzes; an insect that buzzes.

   • And wants not buzzers to infect his ear / With pestilent speeches of his father's death. — 1599
3. •
   (US, slang) A police badge.

   • I flipped my wallet open on her desk and let her look at the buzzer pinned to the flap. — 1939
4. •
   (slang) A run scored from an overthrow.
5. •
   (UK, no longer used) A pickpocket.

   • The pickpocket was a Buzzer. The man who booked a room at a hotel, and went round the rooms of other guests, was a Snoozer. — 1949
6. •
   (no longer used) A gossip.

   • Her brother is in secret come from France, Feeds on this wonder, keeps himself in clouds And wants not buzzers to infect his ear With pestilent speeches of his father's death. — 1599