"You haven't changed in four years," she said sweetly, offering him a quick, insincere smile.

That was really a work of pop art, down to the insincere smiles on our faces.

He looked like a weatherman, slick black hair, insincere smile.

That I'm going to be swept off my feet by that insincere smile?

Davis managed a very insincere smile and made a mock bow.

The man backed off a few steps, then gave the foreign woman an insincere smile.

"We cannot be cruel to her," he said with one of the most insincere smiles I have ever seen on a human being's face.

He looked at Piper, gave him an insincere smile.

The insincere smile left his face, replaced with a more serious countenance.

"There's other things in life than baseball," he said, forcing an insincere smile.