bum rap

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bum rap (plural bum raps)

1. (slang) A false accusation, or an injustice, especially one that leads to imprisonment.
   • 1918 October 7, “Hun Talk”, in Chicago Daily Tribune, page 17:

     . . . going over the top of the wall of the Trenton prison, where I was sent on a bum rap.

2. (idiomatic) An undeservedly unfavorable portrayal or reputation.
   • 2008 September 10, Patti Neighmond, “Study: Arthroscopic Surgery Provides Few Benefits”, in National Public Radio, retrieved 24 March 2009:

     Orthopedic surgeon Robert Marx, with New York's Hospital for Special Surgery, says that findings from the current study should not give arthroscopic knee surgery a bum rap.

• (bad reputation): bad rap

• “bum rap”, in OneLook Dictionary Search.