The bazooka is a brass musical instrument several feet in length which incorporates telescopic tubing like the trombone.

[1] The name "bazooka" comes from an extension of the word "bazoo", which is slang for "mouth" or "boastful talk", and which ultimately probably stems from Dutch bazuin (buisine, a medieval trumpet).

[4][5] From its start within a lipreed mouthpiece – which may consist of nothing but the bare tube or may employ a mouthpiece which is handmade to emulate one from a low brass instrument – the air column expands into a length of large-diameter pipe that slides freely around a length of narrower-diameter pipe, which, in turn, terminates in a widely flaring bell.

In other words, the player's lips produce pitches as they vibrate on the bare pipe end (or on the optional mouthpiece and leadpipe unit), but the pitches produced by the lips cannot generate a standing-wave vibration of the air inside such a wide tube.

[citation needed] Therefore, unlike the trombone, the remainder of the bazooka works mainly as a megaphone to amplify the volume of the sound.