[f. QUACK v.2 + -ING1.] The uttering of the harsh sound denoted by the vb.
1815. W. H. Ireland, Scribbleomania, 1. The sage waddling goose, Whose quacking you’ll own is the very repeater Of my famous Muse.
1880. Mackenzie, Dis. Throat & Nose, I. 491. The barking of a dog or the quacking of a duck.
1892. Baring-Gould, Trag. Cæsars, I. 218. Being incommoded by the quacking of frogs he ordered them to be silent.
