British Dictionary definitions for bum rap
noun US slang
Idioms and Phrases with bum rap
A false accusation or conviction; also, unfair criticism or action. For example, He claimed he was in prison on a bum rap, or The theater critics gave her last play a bum rap. This expression originated in the 1920s as underworld slang, and by the mid-1900s it was also used figuratively for other kinds of injustice.