Source : Webster's Revised Unabridged Dictionary (1913)

Banderillero \Ban`de*ril*le"ro\, n. [Sp.]
   One who thrusts in the banderillas in bullfighting. --W. D.
   Howells.

Source : WordNet®

banderillero
     n : the bullfighter who implants decorated darts (banderillas)
         into the neck or shoulders of the bull during a bull
         fight