noun
a person, especially a lawyer, who uses unscrupulous or unethical methods
adjective
relating to or characteristic of a shyster
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The lawyer was accused of being a shyster for overcharging his clients.
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I wouldn't trust that guy, he's a total shyster.
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Watch out for that shyster, he's always looking to pull a fast one.
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The politician was called a shyster for his dishonest tactics in the election.