something/someone that most people have a negative opinion about. using this term usually implies that the negative opinion is undeserved and may be based on gossip or profiling.
the term is derived from a R.A.P. (Record of Arrests and Prosecutions) sheet which law enforcement maintains on individuals within the criminal
justice system. the "bad" part can refer to either (usually both) the type of conduct shown on the RAP sheet being
particularly troubling, or that the accusations made on the RAP sheet are undeserved and unfairly assigned to
the person.
CBD gets a bad rap because people think its just for potheads
trying to find a legal way
to get high, but it actually has a lot of benefits on its own.
Jack gets a bad rap because he was there when
the party got busted, but he wasn't even drinking that night.