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Forceful or aggressive promotion of one's agenda through public speech or other means. Primarily heard in UK. I wish they would quit their tub-thumping and get on with the show. We don't care about their politics.
thump on (someone or something)
To beat or pound on someone or something with force. The two brothers thump on each other all the time, but they're really very close. The manager thumped on the table to bring some order to the meeting.
Tub-thumping is used as an adjective and a noun to describe people's behaviour when they are supporting an idea or course of action in a loud and forceful way. Economic recovery does not depend on tub-thumping speeches from politicians, but on the Government creating jobs. The players neither need, nor will respond to, tub-thumping. Note: You can call someone who behaves in this way a tub-thumper. Marsh was far from being a tub-thumper. Note: This expression is used to show disapproval. Note: People sometimes used to refer to pulpits (= the place in a church where the priest stands to speak) as `tubs', especially when talking humorously about nonconformist preachers. The image is of a preacher banging the pulpit with his fist to emphasize his message.