a tube-shaped, portable rocket launcher that fires a rocket capable of penetrating several inches of armor plate, as of a tank or other armored military vehicle.
Origin: 1930–35, Americanism; from its resemblance to a musical instrument so named, invented and played by comedian Bob Burns in the 1930s and 1940s
"metal tube rocket launcher," 1942, from name of a junkyard musical instrument used (c.1935) as a prop by U.S. comedian Bob Burns (1896-1956); extension of bazoo, slang for "mouth" or "boastful talk" (1877), probably from Du. bazuin "trumpet."