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 "(a case of)the pot calling the kettle black"


Meaning:
Used humorously to say that you should not criticize someone for something, because you have done the same thing or have the same fault 

مثال 1
Ex.1:
Bill told Barbara she was sloppy, but Bill never cleans up after himself, either. That's the pot calling the kettle black. 

مثال2
Ex.2:
My sister says I dress fuy, but if you've seen some of the clothes she wears, you know it's a case of the pot calling the kettle black.