Source : Webster's Revised Unabridged Dictionary (1913)

Spud \Spud\, n.
   A potato. [Colloq.]

Spud \Spud\, n. [Cf. Dan. spyd a spear.]
   1. A sharp, narrow spade, usually with a long handle, used by
      farmers for digging up large-rooted weeds; a similarly
      shaped implement used for various purposes.

            My spud these nettles from the stone can part.
                                                  --Swyft.

   2. A dagger. [Obs.] --olland.

   3. Anything short and thick; specifically, a piece of dough
      boiled in fat. [Local, U.S.]

Source : WordNet®

spud
     n 1: an edible tuber native to South America; a staple food of
          Ireland [syn: {potato}, {white potato}, {Irish potato},
          {murphy}, {tater}]
     2: a sharp hand shovel for digging out roots and weeds [syn: {stump
        spud}]
     v 1: initiate onsite drilling operations, as for petroleum; "The
          well was spudded in April"
     2: produce buds, branches, or germinate; "the potatoes
        sprouted" [syn: {shoot}, {germinate}, {pullulate}, {bourgeon},
         {burgeon forth}, {sprout}]
     [also: {spudding}, {spudded}]