Source : Webster's Revised Unabridged Dictionary (1913)

Ding \Ding\, 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["a]nga, G. dengeln.]
   1. To dash; to throw violently. [Obs.]

            To ding the book a coit's distance from him.
                                                  --Milton.

   2. To cause to sound or ring.

   {To ding (anything) in one's ears}, to impress one by noisy
      repetition, as if by hammering.

Dung \Dung\, 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.

Dung \Dung\, v. t. [imp. & p. p. {Dunged}; p. pr. & vb. n.
   {Dunging}.]
   1. To manure with dung. --Dryden.

   2. (Calico Print.) To immerse or steep, as calico, in a bath
      of hot water containing cow dung; -- done to remove the
      superfluous mordant.

Dung \Dung\, v. i.
   To void excrement. --Swift.

Source : WordNet®

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