Look who’s talking!

look who's talking

One is guilty of the same thing they have just criticized. A: "Kathy never pays attention in class." B: "Look who's talking! Just today I saw you reading a magazine during the lecture."
See also: look, talk

Look who’s talking!

exclam. You are just as guilty!; You are just as much at fault! Look who’s talking. You were there before I was.
See also: look