The Collaborative International Dictionary of English v.0.48:

Ding \Ding\ (d[i^]ng), v. t. [imp. & p. p. Dinged, Dang
   (Obs.), or Dung (Obs.); p. pr. & vb. n. Dinging.] [OE.
   dingen, dengen; akin to AS. dencgan to knock, Icel. dengja to
   beat, hammer, Sw. d[aum]nga, G. dengeln.]
   1. To dash; to throw violently. [Obs.]
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            To ding the book a coit's distance from him.
                                                  --Milton.
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   2. To cause to sound or ring.
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   To ding (anything) in one's ears, to impress one by noisy
      repetition, as if by hammering.
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The Collaborative International Dictionary of English v.0.48:

Dung \Dung\, v. i.
   To void excrement. --Swift.
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The Collaborative International Dictionary of English v.0.48:

Dung \Dung\ (d[u^]ng), n. [AS. dung; akin to G. dung, d["u]nger,
   OHG. tunga, Sw. dynga; cf. Icel. dyngja heap, Dan. dynge,
   MHG. tunc underground dwelling place, orig., covered with
   dung. Cf. Dingy.]
   The excrement of an animal. --Bacon.
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The Collaborative International Dictionary of English v.0.48:

Dung \Dung\, v. t. [imp. & p. p. Dunged; p. pr. & vb. n.
   Dunging.]
   1. To manure with dung. --Dryden.
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   2. (Calico Print.) To immerse or steep, as calico, in a bath
      of hot water containing cow dung; -- done to remove the
      superfluous mordant.
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WordNet (r) 3.0 (2006):

dung
    n 1: fecal matter of animals [syn: droppings, dung, muck]
    v 1: fertilize or dress with dung; "you must dung the land"
    2: defecate; used of animals