Smiling by means of staring off in space and forming your lips usually so that that top lip is arched and only the top row of teeth show. Then end result usually ends in looking like an idiotic redneck.
Paula: Why did you not load that picture of us on facebook? I wanted to make that my new default picture.
Chad: Sorry, but someone made a Conway Smile in the background, and you know I can't be associated with rednecks.