Corgis are very good at facial expressions. They smile, can make evil faces and then will make a sort of hollowed out face when you're eating and you haven't yet shared your food with them.
Here's Gimli after I scolded him and put him into a down position. This is the same face he makes when he spews a mouthful of corgi swear words.
A few minutes later, I asked Mike about lunch and then Gimli made this face.
He's a clown, this one.