He criticized others for being late, but he always arrived late himself. It was a clear case of double standard.
She acted friendly to my face, but then talked behind my back. She's so two-faced.
She acted like my friend in public, but she was just a pretend friend.
He greeted me with a fake smile, but I could see the insincerity in his eyes.
She offered a phony apology, but I knew she didn't mean it.