The phrase "bum rap" means being falsely accused or blamed for something you didn't do.
Sentences with «bum rap»
«I thought I got a very bum rap,» he said, «when you gave me a Dubious Career Award, or whatever it was, for acting - and you gave the opposite award to Steve Buscemi, for directing. (rogerebert.com)
This is why you can also find people out there, like independent Wall Street economist Robert Brusca, who think the initiative is getting a bum rap. (canadianbusiness.com)