-jew's-harp-

n. [ Jew + harp; or possibly a corrupt. of jaw's harp; cf. G. 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. [ 1913 Webster ]

2. (Naut.) The shackle for joining a chain cable to an anchor. [ 1913 Webster ]