Grifter

wiktionary

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From grift +‎ -er; or an alteration of grafter(“a corrupt person, one who accepts bribes”), which is essentially a doublet of the same word.

etymonline

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grifter (n.)

"confidence trickster," 1906, carnival and circus slang, probably an alteration of grafter (see graft (n.2); also compare grift). Gradually extended to "any non-violent criminal."