boomer

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One that booms.
• noun Informal A baby boomer.
• noun Informal A nuclear submarine armed with ballistic missiles.
• noun A transient worker, especially in bridge construction.
• noun Australian A large, fully grown male kangaroo.

from The Century Dictionary.

• noun One who booms; one who starts and keeps up an agitation in favor of any project or person; one who assists in the organization or furtherance of a boom.
• noun In Australia, a name of the male of a species of kangaroo.
• noun A name of the showt'l or mountain beaver, Haplodon rufus or Aplodontia leporina. See cut under Haplodon.

from the GNU version of the Collaborative International Dictionary of English.

• noun One who, or that which, booms.
• noun (Zoöl.) A North American rodent, so named because it is said to make a booming noise. See Sewellel.
• noun (Zoöl.) A large male kangaroo.
• noun Slang, U. S. One who works up a “boom”.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An adult male kangaroo.
• noun A baby boomer.
• noun US A transient worker who would move from boom town to boom town in search of temporary work.
• noun US, nautical, military, slang A nuclear ballistic missile submarine, SSBN.
• noun UK The bittern.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a member of the baby boom generation in the 1950s