drum major

from WordNet (r) 3.0 (2006)

drum major
    n 1: the leader of a marching band or drum corps

from The Collaborative International Dictionary of English v.0.48

Drum major \Drum" ma"jor\
   .

   1. The chief or first drummer of a regiment; an instructor of
      drummers.
      [1913 Webster]

   2. The marching leader of a military band. [U.S.]
      [1913 Webster]

   3. A noisy gathering. [R.] See under {Drum}, n., 4.
      [1913 Webster]