chicken hawk

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of various hawks that prey on or have the reputation of preying on chickens.
2. n. Informal A person who favors military force or action to carry out a foreign policy but has never served in the military.
3. n. Vulgar Slang A man who seeks out boys or young men as his sexual partners.

Wiktionary

1. n. archaic, zoology Any of the North American hawk species (Cooper's hawk, sharp-shinned hawk and red-tailed hawk), or counterparts elsewhere, mistakenly believed to be pests.
2. n. UK, US, gay slang An adult male preferring younger male sexual partners.
3. n. pejorative, politics, slang An advocate of war or military action who is avoiding personal military service, or avoided it in the past.

WordNet 3.0

1. n. nontechnical term for any hawks said to prey on poultry