More quietly, he said, with an unconvincing smile, "Lots of work here, you know.

She put on a bold and unconvincing smile.

Their expressions - a little flat, with unconvincing smiles - forecast some sort of trouble.

She met his eyes in the mirror and summoned up a weak, unconvincing smile.

At last she stood back, summoning up a weak, unconvincing smile.

The other two nodded diligently in agreement, showing their teeth in unconvincing smiles.

"I had a feeling-" Sandy began, then stopped herself to attempt an unconvincing smile.

For reasons of his own, he attempted a diffident, unconvincing smile.

Kat looked back at Ken and smiled a thin, unconvincing smile.

He flashed me an unconvincing smile, sighed, and said, "Well, yeah.