\Drum"mer\, n.
1. One whose office is to best the drum, as in military
   exercises and marching.
2. One who solicits custom; a commercial traveler. [Colloq.
   U.S.] --Bartlett.
3. (Zo["o]l.) A fish that makes a sound when caught; as:
   (a) The squeteague.
   (b) A California sculpin.
4. (Zo["o]l.) A large West Indian cockroach ({Blatta
   gigantea}) which drums on woodwork, as a sexual call.