take to the cleaners
take to the cleaners {v. phr.}, {slang}
1. To win all the money another person has (as in poker).
Watch out if you play poker with Joe; he'll take you to the cleaners.
2. To cheat a person out of his money and possessions by means of a crooked business transaction or other means of dishonest conduct.
I'll never forgive myself for becoming associated with Joe; he took me to the cleaners.
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Source: A Dictionary of American Idioms