I must have been wearing my stupid expression again.

Duvall watched her, still with that stupid expression on his face.

"I haven't heard such a stupid expression since junior high school."

He turned to Joliffe, a shocked, somewhat stupid expression on his face.

I can tell by your stupid expression that you know.

The cadet gazed at him, a stupid expression on his face.

I must have had a stupid expression on my face.

And without a word or any change in his rather stupid expression he turned and walked out the open door.

He scratched his head and looked at me with a stupid expression.

"Anyone who sees you will know exactly what that stupid expression means."