hired gun

hired gun idiom
  1. A person, especially a professional killer, employed to kill someone, as in They thought the murder had been done by a hired gun. The noun gun has been slang for a professional criminal since the mid-1800s.
  2. A person with special knowledge or expertise who is employed to resolve a complex problem. For example, The legal team was looking for a hired gun to handle the antitrust angle of the case. [Slang; 1960s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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