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It’s like a shortened version of the saying “the pot calling the kettle black” which just basically means someone calling out someone else’s fault when they themselves share the same fault they are calling out. Hopes this makes sense

Ohhh tyty i get it now

I think there is a saying like "the pot calling the kettle black" which I think means criticizing another for something when actually that criticism also applies to you. In French we say "l'hôpital qui se fout de la charité" (the hospital mocking the charity).