/keuh zooh"/ , n. , pl. kazoos .
1. a musical toy consisting of a tube that is open at both ends and has a hole in the side covered with parchment or membrane, which produces a buzzing sound when the performer hums into one end. Also called mirliton .
2. Slang.
a. the buttocks.
b. the anus.
[ 1880-85, Amer.; orig. uncert.; alleged to be imit. ]