To fob it off on someone
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to persuade someone to accept something that is of a low quality or different from what they really wanted:
To fob it off on someone meaning & definition 1 of To fob it off on someone.
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to make someone buy or accept something that is not of a good quality or not what they really wanted:
To fob it off on someone meaning & definition 2 of To fob it off on someone.