Putting somebody in charge of a job, when they have a conflict of interest. Often used to refer to industry "self-regulation" or to putting an industry insider on the board that regulates that industry, e.g., appointing an executive of Comcast as chairman of the FCC.

Can also refer to a similar problem in private industry, e.g., putting the manager of a failed project in charge of the investigation into why the project failed.
Mike Taylor has been appointed to head the Food Safety Working Group at the FDA. The President has set the fox to guard the henhouse.
by s%mebody September 23, 2011
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A less explicit version of "You couldn't catch herpes in a whorehouse!" It means that no matter how hard they try, no one will be able to catch anything.
While a pack of dogs chased a cat, the cat insulted them by saying, "You couldn't catch chicken pox in a henhouse!"
by GallopingSausage April 15, 2019
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When a male enters a room filled predominantly with women.
Sarah: “what’s that guy doing at our womens rights protest?”

Ashley: “I don’t know, he’s a total hog in the henhouse.”
by Beach red neck September 11, 2021
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