Boomer

Boom·er

Boomer

n.
  1. One who, or that which, booms.
  2. A North American rodent, so named because it is said to make a booming noise. See Sewellel. (Zool.)
  3. A large male kangaroo. (Zool.)
  4. One who works up a “boom”. [Slang, U. S.]