His lip curled as he considered me for a long moment.

His lip curled, as if he had known all along what her answer would be.

His lip curled to show what he thought of that.

Her lips curled; as if there could be any question between them!

Her lips curled into what might pass for a smile.

Her lips curled back in something that was not a smile.

His eyes were closed, lips curled in a half smile.

We opened the door, and my upper lip curled back.

His lip curled as he watched the activity by the bed.

I'd missed how her lips curled in just that way.