• Wonk (slang)
• Wonk (character), from The Adventures of Wonk by Muriel Levy
• Policy wonk, an expert in the field of public policy and government

See "Policy Analysis" http://en.wikipedia.org/wiki/Policy_analysis

See Center for Governmental Research blog http://live.cgr.org/policy-wonk/

See National Public Radio story "A Climate 'Policy Wonk' in the Making" http://www.npr.org/templates/story/story.php?storyId=89567328

Merriam-Webster : a person preoccupied with arcane details or procedures in a specialized field, nerdy