BOOMER

Boom″er (–ẽr), n. 1. 1. One who, or that which, booms.
2. 2. (Zoöl.) A North American rodent, so named because it is said to make a booming noise. See Sewellel.
3. 3. (Zoöl.) A large male kangaroo.
4. 4. One who works up a “boom”.