KAZOO

kazoo

(noun) a toy wind instrument that has a membrane that makes a sound when you hum into the mouthpiece

Source: WordNet® 3.1

Etymology

Probably onomatopoeic.

Noun

kazoo (plural kazoos)

(musical instrument) A simple musical instrument (membranophone) consisting of a pipe with a hole in it, producing a buzzing sound when the player hums into it.

Verb

kazoo (third-person singular simple present kazoos, present participle kazooing, simple past and past participle kazooed)

to play the kazoo.

Source: Wiktionary

Ka*zoo", n. [Etymol. uncertain.]

Definition: A kind of toy or rude musical instrument, as a tube inside of which is a stretched string made to vibrate by singing or humming into the tube.

Source: Webster’s Unabridged Dictionary 1913 Edition