The vuvuzela was an insidious "musical" instrument invented by the Geonosians to blow on during their gladiatorial games and public mass-executions. They made nasty buzzing noises that only Geonosians found pleasant. Vuvuzelas were banned throughout the civilized Core Worlds and were used as instruments of torture by the Imperial Inquisitorius. In Whoville, vuvuzelas were referred to as "Who honkers."