US /pɑt ˈkɔlɪŋ ðə ˈkɛtl blæk/
・UK /pɒt ˈkɔ:lɪŋ ðə ˈketl blæk/
So, we say, "It's like the pot calling the kettle black." So, there's a pot and the kettle.
So we say it's like the pot calling the kettle black.
You might call it sour grapes, and you might call it the pot calling the kettle black.