face diarea
Your face can't help but show you're thinking 'why is this person talking like this' or 'this is the worst conversation I've ever had' while you're trying to be patient.
He looked like he had just been asked to explain a joke to a baby.
She had the face of someone who had just been told they were going to be stuck with a bad roommate.
His face looked like it had just been told it had to do a math test with a donkey.