Dedicated to the departed Clement
If you had a hang dog expression, you would have a rather sad look like a dog whose jowls hang down.
For around 50 years, the most famous owner of a hang dog expression was the very funny but serious, Clement Freud. Yes, he was the grandson of the original Sigmund.
He even did adverts featuring his dog, Henry who shared the same look. In fact, if anything, he looked less hang dog than his owner. Rest in Peace, Clement.