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