sb. ? dial. [Echoic: cf. THUNGE; also Lancash. dial. thwang, a great blow (Tim Bobbin, 1746).] A dull heavy sound, as of a blow with the fist, but with some resonance. So Thung v., intr. to make such a sound.
1890. Hall Caine, Bondman, x. The thud and thung of twenty hard fists on the table. Ibid. (1894), Manxman, V. iv. Nancy went back to her kneading . Nancy looked up at her thumping and thunging. Ibid., VI. xii. He went roaring down the stairs, but came thunging up again in a moment.