Related to or involving tricks or deception; cunning in a dishonest way.
From 'con,' short for 'confidence game' or 'convict.' The suffix '-y' turns it into an adjective, originating from late 1800s slang for dishonest schemes.
This word evolved from the criminal underworld—a 'con' was someone running a confidence trick, so 'conny' behavior means acting like a con artist, which shows how slang from criminals actually enters everyday language.
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