filibluster
An extended interval of loud/tempestuous monologue/dialogue that's intended to bully down and/or suppress opposition/suspicion, without actually providing any true validity or solid tangible proof that the proffered opinions/assertions are actually reasonable, accurate, etc.
Nobody listened to Bill Clinton's filibluster about "For the record, I did **NOT** **HAVE** **SEXUAL** **RELATIONS** with that woman." And they aren't listening to him now, either, especially since it was later revealed that he had indeed "gotten some".