(n.) A sound like the cry of a cat, such as is made in playhouses to express dissatisfaction with a play; also, a small shrill instrument for making such a noise.

Bronx Bronx cheer Klaxon bird boiler factory boiler room boo booing bull-roarer cherry bomb clack clacker clapper cracker cricket firecracker give the bird give the raspberry hiss hissing hoot horn noisemaker raspberry rattle rattlebox razz siren snapper steam whistle the bird ticktack whistle whistle at whizgig whizzer