Preaching with a whining, affected tone, perhaps a corruption of chaunting; some derive it from Andrew Cant, a famous Scotch preacher, who used that whining manner of expression. Also a kind of gibberish used by thieves and gypsies, called likewise pedlar's French, the slang, &c. &c.
CANTING
Meaning of CANTING in English
Slang English vocab. Английский сленговый словарь. 2012