buzzer

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.

... it left, however, a bee at his ear and an itch to transfer the buzzer's attentions and tease his darling; for she had betrayed herself as right good game.

A device that makes a buzzing sound.

If you think you know the answer to the question, hit the buzzer as fast as you can.

If a train enters the forward section before its description has been transmitted, a "not described" lamp is illuminated on the transmitter, an alarm buzzer is sounded, and the lamp remains alight until a description has been transmitted.

A police badge.

I flipped my wallet open on her desk and let her look at the buzzer pinned to the flap.

A run scored from an overthrow.

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.

[…] a 'buzzer', for whom picking pockets was an art […]