According to the New Yorker Magazine, it was coined by the New York Herald in 1849 to describe the activities of a petty grifter named William Thompson; what phrase is it?
Etymology, Etymology, and more Etymology
as well as grammar, usage, euphemism, slang, jargon, semantics (meaning), linguistics, neologism, idiom, word origin, syntax, dialect, lexicon (vocabulary), diction, pidgin, synonym, antonym, homonym, cant, argot, lingo, and redundancy.

The critically-acclaimed board game MooT consists of tough questions about the nuances of the English language.
Answer: confidence man
Source: New Yorker, April 26/99, Pg. 152
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