Farmers in the area gave you food with the universal silly smile, but their crops were very poor.

Sara had been right, I saw, about that silly smile.

But a silly smile spreads over my face, and won't go away.

He turned his head and gave her the silliest smile she'd ever seen.

They were wearing evening clothes, and both had rather silly smiles.

They bore an expression she recognized as a silly smile.

He wasn't going to give in to the urge to slap that silly smile off her face.

There is no way to say this and not feel like you should have a silly smile on your face.

"I walked on the field with a silly smile on my face," she said later.

His silly smile made Miles long to kick him in the teeth.