Source : Webster's Revised Unabridged Dictionary (1913)

Tapper \Tap"per\, n. (Zo["o]l.)
   The lesser spotted woodpecker ({Dendrocopus minor}); --
   called also {tapperer}, {tabberer}, {little wood pie},
   {barred woodpecker}, {wood tapper}, {hickwall}, and {pump
   borer}. [Prov. Eng.]

Source : WordNet®

tapper
     n 1: a tavern keeper who taps kegs or casks [syn: {tapster}]
     2: a person who strikes a surface lightly and usually
        repeatedly; "finger tappers irritated her"
     3: a worker who uses a tap to cut screw threads
     4: someone who wiretaps a telephone or telegraph wire [syn: {wiretapper},
         {phone tapper}]
     5: a dancer who who sounds out rhythms by using metal taps on
        the toes and heels of the shoes [syn: {tap dancer}]