Warbles meaning : The sound of one who warbles; singing with trills or modulations. In naval mine warfare, the process of varying the frequency of sound produced by a narrowband noisemaker to ensure that the frequency to which the mine will respond is covered. A lesion under the skin of cattle, caused by the larva of a bot fly of genus Hypoderma. A small hard swelling on a horse's back, caused by the galling of the saddle.