Jew's-harp
Jew's-harp , noun
[Jew + harp; or possibly a corrupt. of jaw's harp; compare German maultrommel, lit., mouthdrum.]
1.
An instrument of music, which, when placed between the teeth, gives, by means of a bent metal tongue struck by the finger, a sound which is modulated by the breath; -- called also Jew's-trump.
2.
(Nautical) The shackle for joining a chain cable to an anchor.