cant - verb
To talk in a singsong, preaching, whining tone; to speak tediously with affected solemnity.
Monotonous speech crammed with platitudes; the special vocabulary of a group or profession; whining speech.
All gentle cant and philosophizing to the contrary notwithstanding, no people in this world ever did achieve their freedom by goody-goody talk and moral suasion: it being immutable law that all revolutions that will succeed, must begin in blood.
—Mark Twain A Connecticut Yankee in King Arthur’s Court (1889)