Tubthumping

[…] the general public, who imagine — poor fools — that all the fury and tubthumping at Westminster is honest emotion, […].

1939, Railway Age, vol. 107, Oct.-Dec. But there is usually more to Automobile Week than good-natured tubthumping for the new passenger car models.

"Our pictures avoid deliberate, tubthumping propaganda but they exude the spirit of democracy."