banderilla

from WordNet (r) 3.0 (2006)

banderilla
    n 1: a decorated dart that is implanted in the neck or shoulders
         of the bull during a bull fight

from The Collaborative International Dictionary of English v.0.48

Banderilla \Ban`de*ril"la\, n. [Sp., dim. of bandera banner. See
   {Banner}, and cf. {Banderole}.]
   A barbed dart carrying a banderole which the banderillero
   thrusts into the neck or shoulder of the bull in a bullfight.
   [Webster 1913 Suppl.]