An employee or agent, esp in some aggressive capacity: We're not just ''hired guns'' out to raise a few bucks for the place/ Keith is not going anywhere as a hired gun for one year(1970s+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with hired-gun
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.
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.
[ ; 1960s